Since 23.02-0ubuntu1~22.04.1 and 23.02-0ubuntu1~20.04.1 were already published to proposed, that version is "burned". The new fix for the issue you found needs to be applied on top of those, and that's the new debdiff that needs sponsoring, not the whole thing again.
Since 23.02-0ubuntu1~ 22.04.1 and 23.02-0ubuntu1~ 20.04.1 were already published to proposed, that version is "burned". The new fix for the issue you found needs to be applied on top of those, and that's the new debdiff that needs sponsoring, not the whole thing again.
Also, that new patch needs to reference a bug.