Unsetting a quickkey would change the current index of self.textFieldComboBox, which would call _updateSourceFieldComboBox(), which would have modelName = "", model = None then raise the issue 'NoneType object is not subscriptable' because of model['flds']
Unsetting a quickkey would change the current index of self.textFieldComboBox, which would call _updateSourceFieldComboBox(), which would have modelName = "", model = None then raise the issue 'NoneType object is not subscriptable' because of model['flds']