diff --git a/pkg/core/blockchain.go b/pkg/core/blockchain.go
index bfe44143b..d0c0a4007 100644
--- a/pkg/core/blockchain.go
+++ b/pkg/core/blockchain.go
@@ -705,9 +705,11 @@ func (bc *Blockchain) storeBlock(block *block.Block, txpool *mempool.Pool) error
 		return err
 	}
 	if err := bc.contracts.Policy.OnPersistEnd(bc.dao); err != nil {
+		bc.lock.Unlock()
 		return fmt.Errorf("failed to call OnPersistEnd for Policy native contract: %w", err)
 	}
 	if err := bc.contracts.Designate.OnPersistEnd(bc.dao); err != nil {
+		bc.lock.Unlock()
 		return err
 	}
 	bc.dao.MPT.Flush()