Currently it doesn't seem like we store the schema and the grants for AQS anywhere in source control - add them. There are currently some pending schema changes for Cassandra 3.11 it would be good to track in future and should we ever have to migrate or rebuild the cluster it would be handy to have these on file.
The Cassandra 3.11 compliant versions of grants and schema are currently in ~hnowlan on aqs1010.