If there are any problems or shortcomings in your novel, the editor may want you to revise it and consider resigning. So if you haven't signed a contract yet, you can consider modifying the novel to make it more in line with the editor's expectations and then contact the editor again to sign the contract. However, please note that if you do not contact the editor again within a period of time, you may lose the opportunity to re-sign. So please make sure to reply to the editor's emails or messages in a timely manner and maintain good communication.