[[!comment format=mdwn
 username="joey"
 subject="""comment 2"""
 date="2019-06-26T15:55:36Z"
 content="""
Occurs to me that the same problems discussed above also can happen when a
new hash is added to git-annex and is used in a repo, that then gets used
by an older version of git-annex.

The blake2 hashes are one such.

So, external backends shouldn't really be blocked by that bad behavior,
agurably.
"""]]