gitea: routers/init.go:86:GlobalInit() [F] ORM engine initialization failed: migrate: do migrate: Error 1091: Can't DROP INDEX ``; check that it exists

• Gitea version (or commit ref):
• Git version:
• Operating system:
• Database (use [x]):
  • PostgreSQL
  • MySQL (MariaDB)
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL)
  • No
  • [ x] Not relevant
• Log gist:

Description

I tried to upgrade from gitea-1.4.3-linux-amd64 to gitea-1.9.2-linux-amd64 by replacing the binary. Now I got the message:

routers/init.go:86:GlobalInit() [F] ORM engine initialization failed: migrate: do migrate: Error 1091: Can't DROP INDEX ``; check that it exists

I noticed this ticket: https://github.com/go-gitea/gitea/issues/3056 but in my case there is an empty string instead of index.

Adding the index to the database as described in the other ticket was also not working: ALTER TABLE repo_unit ADD COLUMN index INT;

So currently I can’t run gitea.