diff --git a/core/systemcontracts/upgrade.go b/core/systemcontracts/upgrade.go
index 0e352fc4298..0a995f28414 100644
--- a/core/systemcontracts/upgrade.go
+++ b/core/systemcontracts/upgrade.go
@@ -56,11 +56,6 @@ func UpgradeBuildInSystemContract(config *chain.Config, blockNumber *big.Int, la
 			}
 			for addr, account := range allocs {
 				logger.Debug("[parlia] upgrade System Contract code", "blockNumber", blockNumber, "blockTime", blockTime, "targetNumberOrTime", numOrTime, "address", addr)
-				prevContractCode := state.GetCode(addr)
-				if len(prevContractCode) == 0 && len(account.Code) > 0 {
-					// system contracts defined after genesis need to be explicitly created
-					state.CreateAccount(addr, true)
-				}
 				state.SetCode(addr, account.Code)
 			}
 		}