Hi there, bonnieozuna.
It looks like our engineers are working on an investigation about this error when manually saving check numbers.
Please contact our phone support team so they can collect your account details. They'll be needing your account information to add you to the list of affected users. We will also be sending email notifications to all customers that are part of the list as soon as the issue is resolved.
Here's how to reach out to them:
- Go to the Help menu and click the Contact Us button.
- Enter the error code in the description box, then click Let's talk.
- Click either Get a callback option or select Start Messaging.
Reach out to us again if you need anything else.