Weird AssertionError

This line was causing some AssertionErrors that didn't seem to make any sense. Is that line necessary? It seems to work fine when it's commented out to bypass the errors.

Traceback (most recent call last):
  File "remoteInt3gSync.py", line 178, in <module>
    sp_list.save()
  File "/usr/local/lib/python2.7/dist-packages/sharepoint/lists/__init__.py", line 322, in save
    assert not any(row._changed for row in self.rows)
AssertionError