cbb330 commented on PR #17842:
URL: https://github.com/apache/iceberg/pull/17842#issuecomment-5808191577

   Thanks for the backport!
   
   Metadata-only deletes still go through `SparkTable.deleteWhere` -> 
`SparkTableUtil.determineWriteBranch(spark, branch)`, which keeps the `"Cannot 
write to both branch and WAP branch"` guard. So `DELETE FROM t.branch_audit 
WHERE <whole-partition predicate>` with `spark.wap.branch` set should still 
throw, while INSERT/row-level ops now succeed. 
   
   #15288 updated this path. Intentional to skip, or should it be ported, with 
a TestDelete case?


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