Youngwb commented on issue #3930:
URL: 
https://github.com/apache/incubator-doris/issues/3930#issuecomment-660675270


   > how to prevent the data lately read with small version?
   
   The small version cannot replace the data with bigger version,  it will 
compare the version column(or sequence column) when the key columns are the 
same.


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