I was aware of the deleted items might be come back alive without proper node repair.
how about modified items, for example 'A'=>{1,2,3}. then 'A'=>{4,5}. if that possible 'A' change back to {1,2,3}? I have encountered this mystery problem after go through a mess procedure with cassandra nodes, (repair,interrupt repair,restart,remove migration,schema sstable,disable gossip,disablethrift,flush,change RF from 2->3 then 3-> then 2->3, rebalance the cluster using move, change key cache and row cache to 0 and change back to 200000) something like this. Is that possible that I could somehow make the old version data replace the new version data? I have 3 nodes and the client read/write consistency level is QUORUM, I have changed it to ONE for awhile and changed it back.