Incorrect cash payments

Hi there,

My client had never reconciled her checking nor credit card accounts in Quickbooks. There are payments to Amex showing in the checking account in error -  she paid from a personal account. However, the payments are now reconciled in the Amex account. If I delete the payments from the check register, I will have to re-reconcile Amex back to 2019. I can do that, but wondered if there was a better way - maybe a journal entry? Thank you in advance for your help!

MJB