Keep getting error when editing entry

[JetFixxxer]

I put the wrong date, went and changed the date. When I select save changes I receive an error message. I don't know what is flagging the error.

[entathlon]

Ensure that the new date you entered for the fuel-up record is in a valid format and accurately reflects the intended change. Verify that the date format matches the expected format (e.g., MM/DD/YYYY or DD/MM/YYYY) and doesn't contain any typos or errors.