Newbie Question - How do I fix this?

[hairyman]

How do I fix this: INT not null primary key auto_increment - Doesn't exist!
This is the message I get when trying to fix the broken fields under the admin section. The field is marked id and is using the default which is created when changing the fieldname to id?
I have only recently purchased appgini and would appreciate your help. Thank you. Also how can I avoid these errors in the future?