Is it possible to downgrade SSTables from ms format (trie indexed) back to me (default in 2026.1)? Will upgradesstable rewrite sstables back to the old format?

[Guy]

Originally from the User Slack

@Ivan_ZalozhnykhIvan_Zalozhnykh**:** Hi, is it possible to downgrade sstable_format from ms (trie indexed) back to me (default in 2026.1)? Will upgradesstable rewrite sstables back to the @avild format?

@avi**:** yes and yes (upgradesstables -a). But why?

@Ivan_Zalozhnykh**:** Just want to have a rollback plan