# Migration back from 20 to 9.3.3.

**URL:** <https://community.endnote.com/t/migration-back-from-20-to-9-3-3/350115>\
**Category:** EndNote Product Suggestions\
**Created:** [June 25, 2021, 2:50pm UTC](https://community.endnote.com/t/migration-back-from-20-to-9-3-3/350115 "2021-06-25T14:50:17Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![przemko](https://avatars.discourse-cdn.com/v4/letter/p/8491ac/32.png) [@przemko](https://community.endnote.com/u/przemko)\
**Post date:** [June 25, 2021, 2:50pm UTC](https://community.endnote.com/t/migration-back-from-20-to-9-3-3/350115/1 "2021-06-25T14:50:17Z")

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Hello, I tried to migrate back but my product key for 20 is not working for the previous version. Is this normal? What can I do in this case?

Cheers!

Przemko