X_MIGRATION_PARTITION_CHANGE
Means
an existing table gained or lost entity({ partitionBy })
Typical cause
Postgres cannot partition a table in place, nor turn a partitioned one back into a plain table: both are a new table and a copy of every row
Fix
put partitionBy back as the table was created, or declare a new entity with partitionBy, backfill() its rows from the old one, then drop the old one in a later release (wiki/Migrations-And-Backfills.md#partitioned-tables)