# field for old packages
query = self.session.query(Component).order_by(Component.ordering) \
.filter(Component.component_name.in_(components))
- source_component = query.first().component_name
+ if query.first() is None:
+ source_component = 'main'
+ else:
+ source_component = query.first().component_name
override = self._source_override(source_component)
if override is None: