Done.
I think the reason you can't change this yourself is that since 501st introduced 5-digit ID's we had to change the expected input of the ID field in the profile, and that field doesn't like 4-digit ID's anymore, and we can't make it accept both 4 and 5-digit ID's, so if you need to change something else, first try adding a 0 to the start of your ID and try again.