Being able to successfully reconcile your accounts is an essential part of your business. I'll be happy to guide you with untangling this issue.
Based on what you've described, it sounds like you'd like to delete one of the transactions. Here's how to do that:
Check out this article for more details: Void or delete transactions in QuickBooks Online. For more info on reconciling, please review these helpful articles:
In case you have further questions, don't hesitate to reach out to our support team using this link.