fix server error on ak wish creation

AKSubmission/forms.py

@@ -52,7 +52,8 @@ class AKForm(forms.ModelForm):
         self.fields['requirements'].queryset = AKRequirement.objects.filter(event=self.initial.get('event'))
         self.fields['prerequisites'].queryset = AK.objects.filter(event=self.initial.get('event'))
         self.fields['conflicts'].queryset = AK.objects.filter(event=self.initial.get('event'))
-        self.fields['owners'].queryset = AKOwner.objects.filter(event=self.initial.get('event'))
+        if "owners" in self.fields:
+            self.fields['owners'].queryset = AKOwner.objects.filter(event=self.initial.get('event'))
 
     @staticmethod
     def _clean_duration(duration):