As mentioned, please contact Adobe support to check if this is a known
issue (I would wonder, though). commit failed due to unresolved
conflicts in /var/workflow/instances/server1/workflow_22/data/metadata
This error happened because the metadata of this workflow steps are
modify concurrently; that should not happen, as the a workflow is not
executed twice in parallel. Can you please double-check the path (you
probably did not a copy&paste), because it should contain the name of
the workflow as ...