Merge pull request #834 from DH-IT-Portal-Development/fix/submit_vali…

…dation_bug

fix: avoid double validation of submit form

proposals/forms.py

@@ -889,9 +889,14 @@ def clean(self):
         from proposals.utils.stepper import Stepper
 
         validator = Stepper(self.instance, request=self.request)
-        # And then we append stepper errors to show them to the user
-        # on the submit page
-        if validator.get_form_errors():
+
+        form_errors = validator.get_form_errors()
+
+        if form_errors:
+            # If there are only errors on the submit form, we override this
+            # validation. Otherwise saving the updated data becomes impossible
+            if len(form_errors) == 1 and "proposals/submit" in form_errors[0]["url"]:
+                return
             self.add_error(
                 None,
                 _("Aanvraag bevat nog foutmeldingen"),