error message displays when trying to close the form/switch to design view

[Colin@Toyota]

I have a form with a subform in it. On the main form, I have a combo box with a list of program numbers to choose from. Once one is selected, the subform displays all the unpaid invoices under that program number. This part works fine. The problem occurs when I try to close the form, switch to design view, or scroll the subform to the right. Basically, the error message says that the record can't be saved because it would create a duplicate value in the index/primary key. However, this form is used to display information only. I have disabled the edit, delete and addition abilities, so I can't figure out why it thinks I am trying to change or add a new record. Any help would be appreciated.

I figured it might make things easier if I included a copy of the database, so here it is.

The form is called SETR, and the subform is AllInfo subform.