loop with contact name

Hello everyone! I have the following problem with a supplier's file, I cannot update any data because there is an error with the contacts, there are two saved contacts without names, which appear as "define new", I cannot find how to delete them and when I want to save changes the system says: you cannot have a contact name "define new". If I edit the "define new" adding a name, another "define new" is automatically generated. Please help me !!