Haven't seen that one before...
Against 204.0-11x, getting different error:
Note: That columnID is 'concreteType'
Does not repro in local testing, nor from master branch.
Since this is an edge case, only repro on staging, I reduce the priority. I added a label "integration-tests" to make it easy for me to search for all "integration-tests" related issues.
In Synapse Python client version 1.9.1. I have fixed all known unstable integration tests.
Not seen anymore.