[Site Down :(] Upgrade\Rebuild Failure - DB Migration Issue?

[JammyDodger]

It seems to think you have two users called racerx. I think there’s a topic about a similar issue here:

@Paulus_Schoutsen

We also had 8 users which had a duplicate username_lower (too many mike’s and marco’s). We renamed those by updating both username and username_lower. From the user data we noticed that the first corruption has happened in December 2019.

Also a more recent one here too:

PG::UniqueViolation Problem during 3.1.0.beta4 upgrade

Thanks for your reply. Yes, I am able to start / enter the app, I am also doing as you suggested. discourse=# REINDEX TABLE users; ERROR: could not create unique index "index_users_on_username_lower" DETAIL: Key (username_lower)=(mostafa11) is duplicated. The problem is duplicates keep coming, I have a lot of user over 300K. Is there any way to check how many duplicates or list all of them? For fixing, I was updating the username_lower like this: I was appending some number at the end. U…