Database Error on update to 1.7.1

[vbonline]

• Gitea version (or commit ref):
• Git version: 1.7.1
• Operating system: Ubuntu 18.04.1
• Database (use [x]):
  • PostgreSQL
  • [ x] MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL)
  • No
  • Not relevant
• Log gist:
  2019/02/01 09:52:22 [I] ORM engine initialization attempt Order milestone by asc or option to set milestones order #10/10...
  2019/02/01 09:52:23 [...itea/routers/init.go:81 GlobalInit()] [E] ORM engine initialization failed: sync database struct error: Error 1138: Invalid use of NULL value

Description

Trying an update from gitea-1.60 to gitea.1.7.1. gitea-1.7.1 doesn't start, error in logfile pointing to error in mysql database.
...

Screenshots

[techknowlogick]

Are you able to enable DB logging, and post the SQL statement that is failing? Info on how to enable that can be found here: https://docs.gitea.io/en-us/config-cheat-sheet/

[vbonline]

Enabled DB-Logging, downloaded latest Master Binary, restarted and it worked without error.

Disabled DB-Logging restarted and gitea-1.7.1 works without an error.

Slightly baffled, but everything is fine now.