Fixes #15115: Fix unhandled exception with invalid permission constra…

…ints

netbox/users/forms/model_forms.py

@@ -385,7 +385,7 @@ def clean(self):
                         CONSTRAINT_TOKEN_USER: 0,  # Replace token with a null user ID
                     }
                     model.objects.filter(qs_filter_from_constraints(constraints, tokens)).exists()
-                except FieldError as e:
+                except (FieldError, ValueError) as e:
                     raise forms.ValidationError({
                         'constraints': _('Invalid filter for {model}: {error}').format(model=model, error=e)
                     })