kazdy commented on PR #8047:
URL: https://github.com/apache/hudi/pull/8047#issuecomment-1445392684

   Another thing that's inconsistent, user can:
   1. insert retords without precombine field specified explicitly -> no 
precombine.field in hoodie.properties
   2. specify precombine.field in DS options, insert data again -> 
precombine.field shows up in hoodie.properties
   3. change precombine.field in DS options, insert data again -> error thrown, 
can't change precombine.field
   
   effectively Hudi allows to use "ts" field as precombine field (implicit) and 
then switch to another field (explicit), but not more times then once


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