diff --git a/Cargo.lock b/Cargo.lock
index be56bf786..38adaf129 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1801,7 +1801,7 @@ dependencies = [
 
 [[package]]
 name = "crab-runtime"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "array-bytes",
  "bp-darwinia-core",
@@ -2842,7 +2842,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "array-bytes",
  "async-trait",
@@ -2921,7 +2921,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-account-migration"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "array-bytes",
  "darwinia-deposit",
@@ -2946,7 +2946,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-asset-limit"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "frame-support",
  "frame-system",
@@ -2957,7 +2957,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-common-runtime"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "bp-darwinia-core",
  "darwinia-precompile-assets",
@@ -2985,7 +2985,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-deposit"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "darwinia-staking-traits",
  "dc-inflation",
@@ -3006,7 +3006,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-ecdsa-authority"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "array-bytes",
  "dc-primitives",
@@ -3026,7 +3026,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-message-gadget"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "array-bytes",
  "frame-support",
@@ -3045,7 +3045,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-message-transact"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "array-bytes",
  "bp-message-dispatch",
@@ -3074,7 +3074,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-precompile-assets"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "fp-evm",
  "frame-support",
@@ -3095,7 +3095,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-precompile-bls12-381"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "ark-bls12-381",
  "ark-ec",
@@ -3113,7 +3113,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-precompile-deposit"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "darwinia-deposit",
  "fp-evm",
@@ -3133,7 +3133,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-precompile-staking"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "darwinia-deposit",
  "darwinia-staking",
@@ -3154,7 +3154,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-precompile-state-storage"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "fp-evm",
  "frame-support",
@@ -3173,7 +3173,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-runtime"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "array-bytes",
  "bp-darwinia-core",
@@ -3285,7 +3285,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-staking"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "darwinia-deposit",
  "darwinia-staking-traits",
@@ -3313,7 +3313,7 @@ dependencies = [
 
 [[package]]
 name = "darwinia-staking-traits"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "parity-scale-codec",
  "scale-info",
@@ -3348,7 +3348,7 @@ dependencies = [
 
 [[package]]
 name = "dc-inflation"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "dc-types",
  "primitive-types",
@@ -3358,7 +3358,7 @@ dependencies = [
 
 [[package]]
 name = "dc-primitives"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "dc-types",
  "fp-account",
@@ -3368,7 +3368,7 @@ dependencies = [
 
 [[package]]
 name = "dc-types"
-version = "6.4.0"
+version = "6.5.0"
 
 [[package]]
 name = "der"
@@ -9250,7 +9250,7 @@ dependencies = [
 
 [[package]]
 name = "pangolin-runtime"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "array-bytes",
  "bp-darwinia-core",
@@ -9364,7 +9364,7 @@ dependencies = [
 
 [[package]]
 name = "pangoro-runtime"
-version = "6.4.0"
+version = "6.5.0"
 dependencies = [
  "array-bytes",
  "bp-darwinia-core",
diff --git a/Cargo.toml b/Cargo.toml
index eb8d61579..95a8a2e35 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -17,7 +17,7 @@ edition    = "2021"
 homepage   = "https://darwinia.network"
 license    = "GPL-3.0"
 repository = "https://github.com/darwinia-network/darwinia"
-version    = "6.4.0"
+version    = "6.5.0"
 
 [workspace.dependencies]
 # crates.io
diff --git a/pallet/message-gadget/Cargo.toml b/pallet/message-gadget/Cargo.toml
index 6f9ddb500..809078456 100644
--- a/pallet/message-gadget/Cargo.toml
+++ b/pallet/message-gadget/Cargo.toml
@@ -57,5 +57,5 @@ try-runtime = [
 	"frame-support/try-runtime",
 	"frame-system/try-runtime",
 	"pallet-evm/try-runtime",
-	"sp-runtime/try-runtime",
+	"sp-runtime?/try-runtime",
 ]
diff --git a/pallet/staking/src/lib.rs b/pallet/staking/src/lib.rs
index 037bd2f03..906c7293e 100644
--- a/pallet/staking/src/lib.rs
+++ b/pallet/staking/src/lib.rs
@@ -95,6 +95,9 @@ pub mod pallet {
 	// Deposit helper for runtime benchmark.
 	#[cfg(feature = "runtime-benchmarks")]
 	use darwinia_deposit::Config as DepositConfig;
+
+	const STORAGE_VERSION: StorageVersion = StorageVersion::new(1);
+
 	/// Empty trait acts as a place holder to satisfy the `#[pallet::config]` macro.
 	#[cfg(not(feature = "runtime-benchmarks"))]
 	pub trait DepositConfig {}
@@ -344,7 +347,8 @@ pub mod pallet {
 	}
 
 	#[pallet::pallet]
-	pub struct Pallet<T>(PhantomData<T>);
+	#[pallet::storage_version(STORAGE_VERSION)]
+	pub struct Pallet<T>(_);
 	#[pallet::hooks]
 	impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {
 		fn on_initialize(_: BlockNumberFor<T>) -> Weight {
@@ -957,23 +961,30 @@ pub mod pallet {
 				return None;
 			}
 
+			let bn = <frame_system::Pallet<T>>::block_number();
+
 			log::info!(
-				"[pallet::staking] assembling new collators for new session {index} at #{:?}",
-				<frame_system::Pallet<T>>::block_number(),
+				"[pallet::staking] assembling new collators for new session {index} at #{bn:?}",
 			);
 
 			if let Ok(collators) = Self::elect() {
-				// TODO?: if we really need this event
-				Self::deposit_event(Event::Elected { collators: collators.clone() });
+				if !collators.is_empty() {
+					// TODO?: if we really need this event
+					Self::deposit_event(Event::Elected { collators: collators.clone() });
 
-				Some(collators)
-			} else {
-				// Impossible case.
-				//
-				// But if there is an issue, retain the old collators; do not alter the session
-				// collators if any error occurs to prevent the chain from stalling.
-				None
+					return Some(collators);
+				}
 			}
+
+			log::error!(
+				"[pallet::staking] fail to elect collators for new session {index} at #{bn:?}"
+			);
+
+			// Impossible case.
+			//
+			// But if there is an issue, retain the old collators; do not alter the session
+			// collators if any error occurs to prevent the chain from stalling.
+			None
 		}
 
 		/// Shift the exposure cache states.
diff --git a/pallet/staking/src/migration.rs b/pallet/staking/src/migration.rs
index 8c496d8f8..ba097a6b3 100644
--- a/pallet/staking/src/migration.rs
+++ b/pallet/staking/src/migration.rs
@@ -42,8 +42,6 @@ pub mod v1 {
 	{
 		#[cfg(feature = "try-runtime")]
 		fn pre_upgrade() -> Result<Vec<u8>, TryRuntimeError> {
-			assert_eq!(StorageVersion::get::<Pallet<T>>(), 0, "Can only upgrade from version 0.");
-
 			Ok(Vec::new())
 		}
 
@@ -52,7 +50,7 @@ pub mod v1 {
 
 			if version != 0 {
 				log::warn!(
-					"[pallet::staking] skipping v0 to v1 migration: executed on wrong storage version. Expected version 1, found {version:?}",
+					"[pallet::staking] skipping v0 to v1 migration: executed on wrong storage version. Expected version 0, found {version:?}",
 				);
 
 				return T::DbWeight::get().reads(1);
@@ -125,10 +123,10 @@ pub mod v1 {
 
 			// Check that everything decoded fine.
 			<ExposureCache1<T>>::iter_keys().for_each(|k| {
-				assert!(<ExposureCache0<T>>::try_get(k).is_ok(), "Can not decode V1 `Exposure`.");
+				assert!(<ExposureCache1<T>>::try_get(k).is_ok(), "Can not decode V1 `Exposure`.");
 			});
 			<ExposureCache2<T>>::iter_keys().for_each(|k| {
-				assert!(<ExposureCache0<T>>::try_get(k).is_ok(), "Can not decode V1 `Exposure`.");
+				assert!(<ExposureCache2<T>>::try_get(k).is_ok(), "Can not decode V1 `Exposure`.");
 			});
 
 			Ok(())
diff --git a/runtime/crab/src/lib.rs b/runtime/crab/src/lib.rs
index f986c2aed..a625bc087 100644
--- a/runtime/crab/src/lib.rs
+++ b/runtime/crab/src/lib.rs
@@ -69,7 +69,7 @@ pub type Executive = frame_executive::Executive<
 	frame_system::ChainContext<Runtime>,
 	Runtime,
 	AllPalletsWithSystem,
-	migration::CustomOnRuntimeUpgrade,
+	(migration::CustomOnRuntimeUpgrade, darwinia_staking::migration::v1::MigrateToV1<Runtime>),
 >;
 
 /// Darwinia proposal base fee.
@@ -82,7 +82,7 @@ pub const VERSION: sp_version::RuntimeVersion = sp_version::RuntimeVersion {
 	spec_name: sp_runtime::create_runtime_str!("Crab2"),
 	impl_name: sp_runtime::create_runtime_str!("DarwiniaOfficialRust"),
 	authoring_version: 0,
-	spec_version: 6_4_0_2,
+	spec_version: 6_5_0_0,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 0,
diff --git a/runtime/darwinia/src/lib.rs b/runtime/darwinia/src/lib.rs
index f729eebff..0f79bd4bf 100644
--- a/runtime/darwinia/src/lib.rs
+++ b/runtime/darwinia/src/lib.rs
@@ -69,7 +69,7 @@ pub type Executive = frame_executive::Executive<
 	frame_system::ChainContext<Runtime>,
 	Runtime,
 	AllPalletsWithSystem,
-	migration::CustomOnRuntimeUpgrade,
+	(migration::CustomOnRuntimeUpgrade, darwinia_staking::migration::v1::MigrateToV1<Runtime>),
 >;
 
 /// Darwinia proposal base fee.
@@ -82,7 +82,7 @@ pub const VERSION: sp_version::RuntimeVersion = sp_version::RuntimeVersion {
 	spec_name: sp_runtime::create_runtime_str!("Darwinia2"),
 	impl_name: sp_runtime::create_runtime_str!("DarwiniaOfficialRust"),
 	authoring_version: 0,
-	spec_version: 6_4_0_2,
+	spec_version: 6_5_0_0,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 0,
diff --git a/runtime/darwinia/src/migration.rs b/runtime/darwinia/src/migration.rs
index c1d3ef74e..a58486668 100644
--- a/runtime/darwinia/src/migration.rs
+++ b/runtime/darwinia/src/migration.rs
@@ -48,10 +48,10 @@ fn migrate() -> frame_support::weights::Weight {
 	const REVERT_BYTECODE: [u8; 5] = [0x60, 0x00, 0x60, 0x00, 0xFD];
 	const USDT_ADDRESS: &str = "0x0000000000000000000000000000000000000403";
 
-	EVM::create_account(
-		H160::from_str(USDT_ADDRESS).expect("USDT_ADDRESS is not a valid address"),
-		REVERT_BYTECODE.to_vec(),
-	);
+	if let Ok(a) = H160::from_str(USDT_ADDRESS) {
+		EVM::create_account(a, REVERT_BYTECODE.to_vec());
+	}
+
 	<Runtime as frame_system::Config>::DbWeight::get().reads_writes(5, 5)
 
 	// frame_support::weights::Weight::zero()
diff --git a/runtime/pangolin/src/lib.rs b/runtime/pangolin/src/lib.rs
index eae088845..7ebf73a45 100644
--- a/runtime/pangolin/src/lib.rs
+++ b/runtime/pangolin/src/lib.rs
@@ -70,7 +70,7 @@ pub type Executive = frame_executive::Executive<
 	frame_system::ChainContext<Runtime>,
 	Runtime,
 	AllPalletsWithSystem,
-	migration::CustomOnRuntimeUpgrade,
+	(migration::CustomOnRuntimeUpgrade, darwinia_staking::migration::v1::MigrateToV1<Runtime>),
 >;
 
 /// Darwinia proposal base fee.
@@ -83,7 +83,7 @@ pub const VERSION: sp_version::RuntimeVersion = sp_version::RuntimeVersion {
 	spec_name: sp_runtime::create_runtime_str!("Pangolin2"),
 	impl_name: sp_runtime::create_runtime_str!("DarwiniaOfficialRust"),
 	authoring_version: 0,
-	spec_version: 6_4_0_7,
+	spec_version: 6_5_0_0,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 0,
diff --git a/runtime/pangoro/src/lib.rs b/runtime/pangoro/src/lib.rs
index 08fc2700f..3312d40ba 100644
--- a/runtime/pangoro/src/lib.rs
+++ b/runtime/pangoro/src/lib.rs
@@ -69,7 +69,7 @@ pub type Executive = frame_executive::Executive<
 	frame_system::ChainContext<Runtime>,
 	Runtime,
 	AllPalletsWithSystem,
-	migration::CustomOnRuntimeUpgrade,
+	(migration::CustomOnRuntimeUpgrade, darwinia_staking::migration::v1::MigrateToV1<Runtime>),
 >;
 
 /// Darwinia proposal base fee.
@@ -82,7 +82,7 @@ pub const VERSION: sp_version::RuntimeVersion = sp_version::RuntimeVersion {
 	spec_name: sp_runtime::create_runtime_str!("Pangoro2"),
 	impl_name: sp_runtime::create_runtime_str!("DarwiniaOfficialRust"),
 	authoring_version: 0,
-	spec_version: 6_4_0_7,
+	spec_version: 6_5_0_0,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 0,