I don't know how you got it to open that form. It is simply a Form to let you know that Errors are turned off.
I have attached a NoBull form in the DB. When it open simply close it and continue working.
I will look close when next time you attach.
I have attached a DB with the Relationships changed. It may not be what you want but it is a suggestion.
PS. Do not use composite Primary keys. They are nothing but trouble.