Looking at the set up you have both the form AND a button(buttonSubmit...) both calling the same query.... any reason why? The form event handler default submit button should be able to handle the validation and the check before submission - calling your handleCreateInstaller query...
That's just how it looks when I add a button in the form footer and give it type "Submit" under Interaction -> Type... I guess it "inherits" the submit action from the form.
Hi @tomasvemola Thanks for reaching out! I'm trying to reproduce this issue. Can you share the validation settings for the child components of the form: