Upgrade Rollback

I have elastic search version 5.5 planning to upgrade it to 7.x .h
How can we rollback es node to 5.5 again after the upgrade. Is it even possible?

That's the same question you asked at Upgrade ElasticSearh from 5.5 to 7.1

Please avoid asking same question twice. Thanks.

Coming back to your question: no you can't downgrade.
As the documentation about upgrades says, you should really snapshot your data before doing an upgrade. That's the only way to be able to restore to the previous version if something goes wrong.

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