diff --git a/Cargo.lock b/Cargo.lock
index f1f769949..6788d718e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -168,7 +168,7 @@ checksum = "43759f68cc29a37659a6b7a48a49674e03a888b6d41f36f4204c36d0d09a51de"
 [[package]]
 name = "array-bytes"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "sp-std 2.0.0",
 ]
@@ -891,8 +891,9 @@ checksum = "dcb25d077389e53838a8158c8e99174c5a9d902dee4904320db714f3c653ffba"
 
 [[package]]
 name = "crab-runtime"
-version = "0.8.7"
+version = "0.8.8"
 dependencies = [
+ "array-bytes 0.3.0",
  "darwinia-balances",
  "darwinia-balances-rpc-runtime-api",
  "darwinia-claims",
@@ -1228,9 +1229,9 @@ dependencies = [
 
 [[package]]
 name = "darwinia"
-version = "0.8.7"
+version = "0.8.8"
 dependencies = [
- "darwinia-cli 0.8.7",
+ "darwinia-cli 0.8.8",
  "darwinia-service",
  "futures 0.3.8",
  "parity-util-mem",
@@ -1239,7 +1240,7 @@ dependencies = [
 [[package]]
 name = "darwinia-balances"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "darwinia-balances-rpc-runtime-api",
  "darwinia-support",
@@ -1254,7 +1255,7 @@ dependencies = [
 [[package]]
 name = "darwinia-balances-rpc"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "darwinia-balances-rpc-runtime-api",
  "jsonrpc-core",
@@ -1269,7 +1270,7 @@ dependencies = [
 [[package]]
 name = "darwinia-balances-rpc-runtime-api"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "darwinia-support",
  "parity-scale-codec",
@@ -1281,7 +1282,7 @@ dependencies = [
 [[package]]
 name = "darwinia-claims"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "array-bytes 1.2.3",
  "darwinia-support",
@@ -1297,7 +1298,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-cli"
-version = "0.8.7"
+version = "0.8.8"
 dependencies = [
  "darwinia-cli 1.2.3",
  "darwinia-service",
@@ -1322,7 +1323,7 @@ dependencies = [
 [[package]]
 name = "darwinia-cli"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "sc-cli",
  "sc-client-api",
@@ -1335,7 +1336,7 @@ dependencies = [
 [[package]]
 name = "darwinia-crab-backing"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -1347,7 +1348,7 @@ dependencies = [
 [[package]]
 name = "darwinia-crab-issuing"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -1359,7 +1360,7 @@ dependencies = [
 [[package]]
 name = "darwinia-democracy"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "darwinia-support",
  "frame-support",
@@ -1374,7 +1375,7 @@ dependencies = [
 [[package]]
 name = "darwinia-elections-phragmen"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "darwinia-support",
  "frame-support",
@@ -1389,7 +1390,7 @@ dependencies = [
 [[package]]
 name = "darwinia-ethereum-backing"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "array-bytes 1.2.3",
  "darwinia-relay-primitives",
@@ -1409,7 +1410,7 @@ dependencies = [
 [[package]]
 name = "darwinia-ethereum-relay"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "array-bytes 1.2.3",
  "blake2-rfc",
@@ -1433,7 +1434,7 @@ dependencies = [
 [[package]]
 name = "darwinia-header-mmr"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "ckb-merkle-mountain-range",
  "darwinia-header-mmr-rpc-runtime-api",
@@ -1450,7 +1451,7 @@ dependencies = [
 [[package]]
 name = "darwinia-header-mmr-rpc"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "darwinia-header-mmr-rpc-runtime-api",
  "jsonrpc-core",
@@ -1465,7 +1466,7 @@ dependencies = [
 [[package]]
 name = "darwinia-header-mmr-rpc-runtime-api"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "darwinia-support",
  "parity-scale-codec",
@@ -1477,7 +1478,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-primitives"
-version = "0.8.7"
+version = "0.8.8"
 dependencies = [
  "frame-system",
  "parity-scale-codec",
@@ -1489,7 +1490,7 @@ dependencies = [
 [[package]]
 name = "darwinia-relay-authorities"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "darwinia-relay-primitives",
  "darwinia-support",
@@ -1504,7 +1505,7 @@ dependencies = [
 [[package]]
 name = "darwinia-relay-primitives"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "frame-support",
  "parity-scale-codec",
@@ -1515,7 +1516,7 @@ dependencies = [
 [[package]]
 name = "darwinia-relayer-game"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "darwinia-relay-primitives",
  "darwinia-support",
@@ -1529,7 +1530,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-rpc"
-version = "0.8.7"
+version = "0.8.8"
 dependencies = [
  "darwinia-balances-rpc",
  "darwinia-header-mmr-rpc",
@@ -1558,7 +1559,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-runtime"
-version = "0.8.7"
+version = "0.8.8"
 dependencies = [
  "array-bytes 0.3.0",
  "darwinia-balances",
@@ -1631,7 +1632,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-runtime-common"
-version = "0.8.7"
+version = "0.8.8"
 dependencies = [
  "darwinia-balances",
  "darwinia-primitives",
@@ -1649,7 +1650,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-service"
-version = "0.8.7"
+version = "0.8.8"
 dependencies = [
  "array-bytes 0.3.0",
  "crab-runtime",
@@ -1700,7 +1701,7 @@ dependencies = [
 [[package]]
 name = "darwinia-staking"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "darwinia-staking-rpc-runtime-api",
  "darwinia-support",
@@ -1724,7 +1725,7 @@ dependencies = [
 [[package]]
 name = "darwinia-staking-rpc"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "darwinia-staking-rpc-runtime-api",
  "jsonrpc-core",
@@ -1739,7 +1740,7 @@ dependencies = [
 [[package]]
 name = "darwinia-staking-rpc-runtime-api"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "darwinia-support",
  "parity-scale-codec",
@@ -1751,7 +1752,7 @@ dependencies = [
 [[package]]
 name = "darwinia-support"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "ethereum-primitives",
  "frame-support",
@@ -1765,7 +1766,7 @@ dependencies = [
 [[package]]
 name = "darwinia-treasury"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "darwinia-support",
  "frame-support",
@@ -1779,7 +1780,7 @@ dependencies = [
 [[package]]
 name = "darwinia-tron-backing"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -1791,7 +1792,7 @@ dependencies = [
 [[package]]
 name = "darwinia-vesting"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "darwinia-support",
  "enumflags2",
@@ -2036,7 +2037,7 @@ dependencies = [
 [[package]]
 name = "ethereum-primitives"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "array-bytes 1.2.3",
  "ethash",
@@ -3976,9 +3977,9 @@ dependencies = [
 
 [[package]]
 name = "log"
-version = "0.4.11"
+version = "0.4.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4fabed175da42fed1fa0746b0ea71f412aa9d35e76e95e59b192c64b9dc2bf8b"
+checksum = "fcf3805d4480bb5b86070dcfeb9e2cb2ebc148adb753c5cca5f884d1d65a42b2"
 dependencies = [
  "cfg-if 0.1.10",
 ]
@@ -4100,7 +4101,7 @@ checksum = "71d96e3f3c0b6325d8ccd83c33b28acb183edcb6c67938ba104ec546854b0882"
 [[package]]
 name = "merkle-patricia-trie"
 version = "1.2.3"
-source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#d7650ad83552b73e114345197facbe7c1d865522"
+source = "git+https://github.com/darwinia-network/darwinia-common.git?branch=master#5bafe86a232b2a1d00400ed57299c40ffbe04bd0"
 dependencies = [
  "hashbrown 0.9.1",
  "keccak-hash",
diff --git a/Cargo.toml b/Cargo.toml
index 82072d6f1..21702b20d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,7 +6,7 @@ homepage    = "https://darwinia.network/"
 license     = "GPL-3.0"
 name        = "darwinia"
 repository  = "https://github.com/darwinia-network/darwinia/"
-version     = "0.8.7"
+version     = "0.8.8"
 
 [[bin]]
 name = "darwinia"
diff --git a/cli/Cargo.toml b/cli/Cargo.toml
index 3a7d53185..b6c3118af 100644
--- a/cli/Cargo.toml
+++ b/cli/Cargo.toml
@@ -7,7 +7,7 @@ homepage    = "https://darwinia.network/"
 license     = "GPL-3.0"
 name        = "darwinia-cli"
 repository  = "https://github.com/darwinia-network/darwinia/"
-version     = "0.8.7"
+version     = "0.8.8"
 
 [package.metadata.wasm-pack.profile.release]
 # `wasm-opt` has some problems on linux, see
@@ -19,7 +19,7 @@ crate-type = ["cdylib", "rlib"]
 
 [dependencies]
 # crates
-log                  = { version = "0.4.11" }
+log                  = { version = "0.4.13" }
 serde                = { version = "1.0.118", optional = true }
 structopt            = { version = "0.3.21" }
 tokio                = { version = "0.3.5", optional = true, features = ["rt-multi-thread"] }
diff --git a/node/service/Cargo.toml b/node/service/Cargo.toml
index df8ed53ff..dff80b24f 100644
--- a/node/service/Cargo.toml
+++ b/node/service/Cargo.toml
@@ -6,14 +6,14 @@ homepage    = "https://darwinia.network/"
 license     = "GPL-3.0"
 name        = "darwinia-service"
 repository  = "https://github.com/darwinia-network/darwinia/"
-version     = "0.8.7"
+version     = "0.8.8"
 
 [dependencies]
 # crates
 array-bytes = { version = "0.3.0" }
 codec       = { package = "parity-scale-codec", version = "1.3.5", features = ["derive"] }
 futures     = { version = "0.3.8" }
-log         = { version = "0.4.11" }
+log         = { version = "0.4.13" }
 serde       = { version = "1.0.118", features = ["derive"] }
 serde_json  = { version = "1.0.61" }
 # darwinia frame
diff --git a/primitives/Cargo.toml b/primitives/Cargo.toml
index be9fc0e4e..3803f698e 100644
--- a/primitives/Cargo.toml
+++ b/primitives/Cargo.toml
@@ -6,7 +6,7 @@ homepage    = "https://darwinia.network/"
 license     = "GPL-3.0"
 name        = "darwinia-primitives"
 repository  = "https://github.com/darwinia-network/darwinia/"
-version     = "0.8.7"
+version     = "0.8.8"
 
 [dependencies]
 # crates
diff --git a/rpc/Cargo.toml b/rpc/Cargo.toml
index 59a548df5..a00396cc6 100644
--- a/rpc/Cargo.toml
+++ b/rpc/Cargo.toml
@@ -6,7 +6,7 @@ homepage    = "https://darwinia.network/"
 license     = "GPL-3.0"
 name        = "darwinia-rpc"
 repository  = "https://github.com/darwinia-network/darwinia/"
-version     = "0.8.7"
+version     = "0.8.8"
 
 [dependencies]
 # crates
diff --git a/runtime/common/Cargo.toml b/runtime/common/Cargo.toml
index 67aadb4a9..68c58c36f 100644
--- a/runtime/common/Cargo.toml
+++ b/runtime/common/Cargo.toml
@@ -6,7 +6,7 @@ homepage    = "https://darwinia.network/"
 license     = "GPL-3.0"
 name        = "darwinia-runtime-common"
 repository  = "https://github.com/darwinia-network/darwinia/"
-version     = "0.8.7"
+version     = "0.8.8"
 
 [dependencies]
 # crates
diff --git a/runtime/crab/Cargo.toml b/runtime/crab/Cargo.toml
index cb4019ad7..11158d1c5 100644
--- a/runtime/crab/Cargo.toml
+++ b/runtime/crab/Cargo.toml
@@ -7,10 +7,11 @@ homepage    = "https://darwinia.network/"
 license     = "GPL-3.0"
 name        = "crab-runtime"
 repository  = "https://github.com/darwinia-network/darwinia/"
-version     = "0.8.7"
+version     = "0.8.8"
 
 [dependencies]
 # crates
+array-bytes       = { version = "0.3.0" }
 codec             = { package = "parity-scale-codec", version = "1.3.5", default-features = false, features = ["derive"] }
 serde             = { version = "1.0.118", optional = true }
 smallvec          = { version = "1.6.1" }
diff --git a/runtime/crab/src/lib.rs b/runtime/crab/src/lib.rs
index c3438f7b4..b32a97c5b 100644
--- a/runtime/crab/src/lib.rs
+++ b/runtime/crab/src/lib.rs
@@ -137,7 +137,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("Crab"),
 	impl_name: create_runtime_str!("Darwinia Crab"),
 	authoring_version: 0,
-	spec_version: 32,
+	spec_version: 33,
 	impl_version: 0,
 	#[cfg(not(feature = "disable-runtime-api"))]
 	apis: RUNTIME_API_VERSIONS,
@@ -1321,18 +1321,18 @@ impl frame_support::traits::OnRuntimeUpgrade for CustomOnRuntimeUpgrade {
 		// --- substrate ---
 		use frame_support::migration::*;
 
-		if let Some(term) = take_storage_value::<darwinia_relay_primitives::relay_authorities::Term>(
+		put_storage_value::<([u8; 32], Vec<(AccountId, [u8; 65])>)>(
 			b"Instance0DarwiniaRelayAuthorities",
-			b"AuthorityTerm",
+			b"AuthoritiesToSign",
 			&[],
-		) {
-			put_storage_value(
-				b"Instance0DarwiniaRelayAuthorities",
-				b"AuthorityTerm",
-				&[],
-				term - 1,
-			);
-		}
+			(
+				array_bytes::bytes_array_unchecked!(
+					"0x380132304c719f4aec2b56ad3f67828da851e226923de36cba246e401273f203",
+					32
+				),
+				vec![],
+			),
+		);
 
 		<Runtime as frame_system::Trait>::MaximumBlockWeight::get()
 	}
diff --git a/runtime/darwinia/Cargo.toml b/runtime/darwinia/Cargo.toml
index 1df62ade3..db91579b4 100644
--- a/runtime/darwinia/Cargo.toml
+++ b/runtime/darwinia/Cargo.toml
@@ -7,7 +7,7 @@ homepage    = "https://darwinia.network/"
 license     = "GPL-3.0"
 name        = "darwinia-runtime"
 repository  = "https://github.com/darwinia-network/darwinia/"
-version     = "0.8.7"
+version     = "0.8.8"
 
 [dependencies]
 # crates
diff --git a/runtime/darwinia/src/lib.rs b/runtime/darwinia/src/lib.rs
index a13a5bedd..9cbc93406 100644
--- a/runtime/darwinia/src/lib.rs
+++ b/runtime/darwinia/src/lib.rs
@@ -172,7 +172,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("Darwinia"),
 	impl_name: create_runtime_str!("Darwinia"),
 	authoring_version: 0,
-	spec_version: 13,
+	spec_version: 14,
 	impl_version: 0,
 	#[cfg(not(feature = "disable-runtime-api"))]
 	apis: RUNTIME_API_VERSIONS,
@@ -1379,16 +1379,10 @@ impl frame_support::traits::OnRuntimeUpgrade for CustomOnRuntimeUpgrade {
 	fn on_runtime_upgrade() -> frame_support::weights::Weight {
 		// --- substrate ---
 		// use frame_support::migration::*;
-		use frame_support::traits::Currency;
 		// --- darwinia ---
 		// use darwinia_relay_primitives::relay_authorities::RelayAuthority;
 		// use darwinia_support::balance::lock::{LockFor, LockableCurrency, WithdrawReasons};
 
-		Ring::make_free_balance_be(
-			&<darwinia_ethereum_backing::Module<Runtime>>::fee_account_id(),
-			Ring::minimum_balance(),
-		);
-
 		// // @wuminzhe
 		// let account_id = array_bytes::hex_str_array_unchecked!(
 		// 	"0x129f002b1c0787ea72c31b2dc986e66911fe1b4d6dc16f83a1127f33e5a74c7d",