Hello, Let's have version 1 of my job uses keyed state with name "a" and type A, which some Avro generated class. Then I upgrade to version 2, which in addition uses keyed state "b" and type B (another concrete Avro generated class), I take savepoint with version 2 and decided to downgrade to version 1 and start with taken savepoint, can I do it? On one hand, version 1 doesn't have state "b", but seems Flink still tries to create call restoreSerializer​ and it tries to read runtimeType (`class B`) which is not available in version 1
Thanks, Alexey
