rdblue commented on issue #4510:
URL: https://github.com/apache/iceberg/issues/4510#issuecomment-1163236562

   @itaise, by default tables use the v1 format, which didn't use unique IDs 
for partition fields in metadata. That was fixed in v2. So when you upgrade a 
table to v2, (set the `table-format` property to 2) your changes will actually 
remove the unnecessary field that references the old column, rather than 
keeping a placeholder partition field around for it.


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