I process 800 CA returns a year and haven't had any problems like this....can you Delete the form (it should regenerate automatically) and start over?

How about remove the TIN completely from both top and bottom?

FWIW, if this is a non-taxable refund (because they didnt itemize in 2021) you can go to the Carryover Worksheet and just delete the refund amount and the form will stop bugging you.