173                     b'parents write mode'

   173                     b'parents write mode'

   174                 )

   174                 )

   175             )

   175             )

   176 

   176 

   177         with self._revlog._writing(transaction):

   177         with self._revlog._writing(transaction):

   178             if self._fix_issue6528:

   179             if self._fix_issue6528:

   179                 deltas = rewrite.filter_delta_issue6528(self._revlog, deltas)

   180                 deltas = rewrite.filter_delta_issue6528(self._revlog, deltas)

   180 

   181 

   181             return self._revlog.addgroup(

   182             return self._revlog.addgroup(

   182                 deltas,

   183                 deltas,