diff --git a/Lib9c/Action/ValidatorDelegation/UpdateValidators.cs b/Lib9c/Action/ValidatorDelegation/UpdateValidators.cs
index 89b1d9c0c8..fb1c87075b 100644
--- a/Lib9c/Action/ValidatorDelegation/UpdateValidators.cs
+++ b/Lib9c/Action/ValidatorDelegation/UpdateValidators.cs
@@ -32,25 +32,27 @@ public override IWorld Execute(IActionContext context)
             var repository = new ValidatorRepository(world, context);
             var validators = repository.GetValidatorList().ActiveSet();
 
-            foreach (var deactivated in prevValidators.Except(validators))
+            foreach (var deactivated in prevValidators.Select(v => v.OperatorAddress)
+                .Except(validators.Select(v => v.OperatorAddress)))
             {
-                var validatorDelegatee = repository.GetValidatorDelegatee(deactivated.OperatorAddress);
+                var validatorDelegatee = repository.GetValidatorDelegatee(deactivated);
                 validatorDelegatee.Deactivate();
                 repository.SetValidatorDelegatee(validatorDelegatee);
                 var guildRepository = new GuildRepository(repository.World, repository.ActionContext);
-                var validatorDelegateeForGuildParticipant = guildRepository.GetGuildDelegatee(deactivated.OperatorAddress);
+                var validatorDelegateeForGuildParticipant = guildRepository.GetGuildDelegatee(deactivated);
                 validatorDelegateeForGuildParticipant.Deactivate();
                 guildRepository.SetGuildDelgatee(validatorDelegateeForGuildParticipant);
                 repository.UpdateWorld(guildRepository.World);
             }
 
-            foreach (var activated in validators.Except(prevValidators))
+            foreach (var activated in validators.Select(v => v.OperatorAddress)
+                .Except(prevValidators.Select(v => v.OperatorAddress)))
             {
-                var validatorDelegatee = repository.GetValidatorDelegatee(activated.OperatorAddress);
+                var validatorDelegatee = repository.GetValidatorDelegatee(activated);
                 validatorDelegatee.Activate();
                 repository.SetValidatorDelegatee(validatorDelegatee);
                 var guildRepository = new GuildRepository(repository.World, repository.ActionContext);
-                var validatorDelegateeForGuildParticipant = guildRepository.GetGuildDelegatee(activated.OperatorAddress);
+                var validatorDelegateeForGuildParticipant = guildRepository.GetGuildDelegatee(activated);
                 validatorDelegateeForGuildParticipant.Activate();
                 guildRepository.SetGuildDelgatee(validatorDelegateeForGuildParticipant);
                 repository.UpdateWorld(guildRepository.World);
diff --git a/Lib9c/ValidatorDelegation/ValidatorDelegatee.cs b/Lib9c/ValidatorDelegation/ValidatorDelegatee.cs
index fd350c5800..c3fa0d537b 100644
--- a/Lib9c/ValidatorDelegation/ValidatorDelegatee.cs
+++ b/Lib9c/ValidatorDelegation/ValidatorDelegatee.cs
@@ -202,10 +202,14 @@ public void Activate()
             ValidatorRepository repository = (ValidatorRepository)Repository;
             IsActive = true;
             Metadata.DelegationPoolAddress = ActiveDelegationPoolAddress;
-            repository.TransferAsset(
-                InactiveDelegationPoolAddress,
-                ActiveDelegationPoolAddress,
-                TotalDelegated);
+
+            if (TotalDelegated.Sign > 0)
+            {
+                repository.TransferAsset(
+                    InactiveDelegationPoolAddress,
+                    ActiveDelegationPoolAddress,
+                    TotalDelegated);
+            }
         }
 
         public void Deactivate()
@@ -213,10 +217,14 @@ public void Deactivate()
             ValidatorRepository repository = (ValidatorRepository)Repository;
             IsActive = false;
             Metadata.DelegationPoolAddress = InactiveDelegationPoolAddress;
-            repository.TransferAsset(
-                ActiveDelegationPoolAddress,
-                InactiveDelegationPoolAddress,
-                TotalDelegated);
+
+            if (TotalDelegated.Sign > 0)
+            {
+                repository.TransferAsset(
+                    ActiveDelegationPoolAddress,
+                    InactiveDelegationPoolAddress,
+                    TotalDelegated);
+            }
         }
 
         public void OnDelegationChanged(object? sender, long height)