# 2.7.0.beta2 upgrade failed with ERROR: duplicate key

**URL:** <https://meta.discourse.org/t/2-7-0-beta2-upgrade-failed-with-error-duplicate-key/176980>\
**Category:** Self-hosting\
**Created:** [January 22, 2021, 8:25pm UTC](https://meta.discourse.org/t/2-7-0-beta2-upgrade-failed-with-error-duplicate-key/176980 "2021-01-22T20:25:45Z")\
**Posts on this page:** 1\
**Showing post:** 24

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**Author:** ![pfaffman](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/pfaffman/32/120154_2.png) [@pfaffman](https://meta.discourse.org/u/pfaffman)\
**Post date:** [January 25, 2021, 7:09pm UTC](https://meta.discourse.org/t/2-7-0-beta2-upgrade-failed-with-error-duplicate-key/176980/24 "2021-01-25T19:09:09Z")

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Easiest is probably to change DRC to DRC1 (or whatever) in the web interface (and I think it’ll also fix `@` references in posts?). You don’t need to change `username_lower`, as that’s calculated.

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