I upgraded from version 2.3.0 to 2.4.0
I start optimize
I see ngram max difference warning in the log
I don't see ngram related warnings, as they have been resolved by a index settings config change with
Due to that during migration the index settings don't get updated but during every restart the mappings get updated we see the ngram difference warning after migrating from <=2.3.0 to 2.4.0.