Below is a dialogue between software developers, the first one used ChatGPT in his solution of code task and makes a comment,   the second one gives him reply on his solution. Write a reply that appropriately answers the comment.

### Comment:
hi there,currently this isnt directly supported because in cassandra we rebuild the index at compaction time and evict obsolete rows then.  however, it would be straightforward to add native deletes to jvector using nn descent.  gpt explains what is your use case?### Reply:
hi, thanks for the reply. the usecase is simply to undo a mistake.