diff --git a/Cargo.lock b/Cargo.lock
index 4b5bb405..5c055b5a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -84,7 +84,7 @@ dependencies = [
 
 [[package]]
 name = "alphanet-runtime"
-version = "1.2.5"
+version = "1.2.6"
 dependencies = [
  "alphanet-runtime-constants",
  "frame-benchmarking",
@@ -3663,7 +3663,7 @@ dependencies = [
 
 [[package]]
 name = "mainnet-runtime"
-version = "1.2.5"
+version = "1.2.6"
 dependencies = [
  "frame-benchmarking",
  "frame-election-provider-support",
@@ -8416,7 +8416,7 @@ dependencies = [
 
 [[package]]
 name = "ternoa-runtime-common"
-version = "1.2.5"
+version = "1.2.6"
 dependencies = [
  "frame-election-provider-support",
  "frame-support",
diff --git a/runtime/alphanet/Cargo.toml b/runtime/alphanet/Cargo.toml
index 9b658657..b75514ca 100644
--- a/runtime/alphanet/Cargo.toml
+++ b/runtime/alphanet/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "alphanet-runtime"
 authors = [ "Ternoa" ]
-version = "1.2.5"
+version = "1.2.6"
 edition = "2021"
 build = "build.rs"
 
diff --git a/runtime/common/Cargo.toml b/runtime/common/Cargo.toml
index 6a606670..3a064bca 100644
--- a/runtime/common/Cargo.toml
+++ b/runtime/common/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "ternoa-runtime-common"
 authors = [ "Ternoa" ]
-version = "1.2.5"
+version = "1.2.6"
 edition = "2021"
 
 [dependencies]
diff --git a/runtime/mainnet/Cargo.toml b/runtime/mainnet/Cargo.toml
index dcfcc2f3..8b68843a 100644
--- a/runtime/mainnet/Cargo.toml
+++ b/runtime/mainnet/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "mainnet-runtime"
 authors = [ "Ternoa" ]
-version = "1.2.5"
+version = "1.2.6"
 edition = "2021"
 build = "build.rs"
 
diff --git a/runtime/mainnet/src/lib.rs b/runtime/mainnet/src/lib.rs
index 3b6d9df0..2f11cf08 100644
--- a/runtime/mainnet/src/lib.rs
+++ b/runtime/mainnet/src/lib.rs
@@ -187,7 +187,7 @@ mod custom_migration {
 	use super::*;
 	use frame_election_provider_support::SortedListProvider;
 	use frame_support::{traits::OnRuntimeUpgrade, weights::Weight};
-	use pallet_staking::{Nominators, Pallet};
+	use pallet_staking::{Pallet, Validators};
 
 	pub struct Upgrade;
 	impl OnRuntimeUpgrade for Upgrade {
@@ -198,9 +198,21 @@ mod custom_migration {
 		}
 
 		fn on_runtime_upgrade() -> Weight {
-			<Runtime as pallet_staking::Config>::VoterList::unsafe_regenerate(
-				Nominators::<Runtime>::iter().map(|(id, _)| id),
-				Pallet::<Runtime>::weight_of_fn(),
+			let prev_count = <Runtime as pallet_staking::Config>::VoterList::count();
+			let weight_of_cached = Pallet::<Runtime>::weight_of_fn();
+			for (v, _) in Validators::<Runtime>::iter() {
+				let weight = weight_of_cached(&v);
+				let _ =
+					<Runtime as pallet_staking::Config>::VoterList::on_insert(v.clone(), weight)
+						.map_err(|err| {
+							log::info!("failed to insert {:?} into VoterList: {:?}", v, err);
+						});
+			}
+			log::info!(
+				"injected a total of {} new voters, prev count: {} next count: {}, updating.",
+				Validators::<Runtime>::count(),
+				prev_count,
+				<Runtime as pallet_staking::Config>::VoterList::count(),
 			);
 			debug_assert_eq!(<Runtime as pallet_staking::Config>::VoterList::try_state(), Ok(()));
 			Weight::MAX
diff --git a/runtime/mainnet/src/version.rs b/runtime/mainnet/src/version.rs
index 30565872..d1460ca7 100644
--- a/runtime/mainnet/src/version.rs
+++ b/runtime/mainnet/src/version.rs
@@ -44,7 +44,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	/// Version of the runtime specification. A full-node will not attempt to use its native
 	/// runtime in substitute for the on-chain Wasm runtime unless all of `spec_name`,
 	/// `spec_version` and `authoring_version` are the same between Wasm and native.
-	spec_version: 12,
+	spec_version: 13,
 
 	/// Version of the implementation of the specification. Nodes are free to ignore this; it
 	/// serves only as an indication that the code is different; as long as the other two versions