min.insync.replicas does not impact producers when acks=1 (only when acks=all)

Since Confluent 5.4.0, Avro 1.9.1 is used. Since default value was added to enum complex type , the schema resolution changed from:
(<1.9.1) if both are enums:** if the writer's symbol is not present in the reader's enum, then an error is signalled. **(>=1.9.1) if both are enums:
if the writer's symbol is not present in the reader's enum and the reader has a default value, then that value is used, otherwise an error is signalled.

This is active-passing as the replicated topic is used for read-only purposes only

we have two tables, so the max number of tasks is 2

We can only add partitions to an existing topic, and it must be done using the kafka-topics.sh command