Only the deployer can increment the deployment nonce

contracts/NonceHolder.sol

@@ -133,7 +133,7 @@ contract NonceHolder is INonceHolder, ISystemContract {
     /// @param _address The address of the account which to return the deploy nonce for.
     /// @return prevDeploymentNonce The deployment nonce at the time this function is called.
     function incrementDeploymentNonce(address _address) external returns (uint256 prevDeploymentNonce) {
-        require(msg.sender == address(DEPLOYER_SYSTEM_CONTRACT), "");
+        require(msg.sender == address(DEPLOYER_SYSTEM_CONTRACT), "Only the deployer can increment the deployment nonce");
         uint256 addressAsKey = uint256(uint160(_address));
         uint256 oldRawNonce = rawNonces[addressAsKey];