I have two tables with a relation one to many - so in the first one a primary key and in the second a foreign key. I make a form with a subform using the wizard, based on those two tables . I replace the text box on the form with a combo, and I set the source of the combo with a query from the origin table. Every time I change now from the combo, I get in the subform the values that are corespondant. But when I want to modify, I get error saying im risking double values on index fields blabla. Where am I wrong?
Thanks
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