TypeError                                 Traceback (most recent call last)
Cell In[39], line 1
----> 1 streamset.earliest()

File /opt/conda/lib/python3.10/site-packages/btrdb/stream.py:1602, in StreamSetBase.earliest(self)
   1597     logger.debug(f"versions: {versions}")
   1598 earliest_points_gen = self._btrdb._executor.map(
   1599     lambda s: s.nearest(start, version=versions.get(s.uuid, 0), backward=False),
   1600     self._streams,
   1601 )
-> 1602 for point, _ in earliest_points_gen:
   1603     earliest.append(point)
   1605 return tuple(earliest)

TypeError: cannot unpack non-iterable NoneType object