Good evening, @comet52.
Thanks for reaching out to the Community.
You can go to the transaction in your register and manually reconcile it. This will resolve your opening balance for your reconcile. Check out the steps below to do this.
1. Open the register that contains the transaction.
2. Select the transaction to expand the view.
3. Under the checkmark column, click until you see an R. This reconciles the transaction.
4. Hit Save once you've manually reconciled the transaction.
You can see additional details outlined in Fix beginning balance issues if you've reconciled the account in the past.
Let me know if you need further assistance. I'll be here every step of the way. Feel free to reach out to the Community any time. Take care and enjoy the week!