X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/55b5ec75a3f6c9154778c8836a99db37e3250abf..2b288a6027b06e969461ebfe2104249302bb0a72:/sdk/python/arvados/collection.py

diff --git a/sdk/python/arvados/collection.py b/sdk/python/arvados/collection.py
index 55be40fa04..a076de6baf 100644
--- a/sdk/python/arvados/collection.py
+++ b/sdk/python/arvados/collection.py
@@ -1395,7 +1395,7 @@ class Collection(RichCollectionBase):
                 # our tokens.
                 return
             else:
-                self._past_versions.add((response.get("modified_at"), response.get("portable_data_hash")))
+                self._remember_api_response(response)
             other = CollectionReader(response["manifest_text"])
         baseline = CollectionReader(self._manifest_text)
         self.apply(baseline.diff(other))