S23 Ultra - All Contacts Default to Work Fax - how can I change the primary default number for ALL contacts?

[Guggymom]

For some reason, all my contacts default to the Work FAX phone number, which is obviously not very useful!  While I can change the default one by one with a long press for each contact, is there some way to tell the phone to use a different number - ideally mobile, but I'd even take Work Phone - besides Work Fax?  Thanks!