lszskye commented on PR #8782:
URL: https://github.com/apache/paimon/pull/8782#issuecomment-5055091744

   > * `SchemaManager.java:898` only migrated `map.storage-layout` and 
`map.shared-shredding.max-columns`, omitting 
`MAP_SHARED_SHREDDING_COLUMN_PLACEMENT_POLICY` (defined in 
`CoreOptions.java:103`).
   > * If the original column is configured as `plain`/`sequential`, the old 
option will remain under the old column name after the rename, and the new 
column will silently fall back to the default `LRU`, resulting in changes to 
subsequent file layout behavior.
   > * It is recommended to add this option to the rename list and perform 
additional testing to verify that old keys are deleted and new keys/values are 
retained.
   
   DONE. I have fixed this issue and added a unit test to verify it.


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