Hello, i have a form and when need to add a new record i enable all the elements in my form, i have one button that calls a form (i haven't save or undo antything in the main form) and when i try to save a new record in this new window i placed the next message error:

fail to update the table: uniqueness of index

But it let me save the record after all.

And the second problem is when i try to return to the main form and do something in some of the form fields, it just doesn't allow me.

How can i solve this two problems.