This is needed before we can stop writing to the old fields
- ALTERs to run: https://gerrit.wikimedia.org/r/c/mediawiki/core/+/801383/12/maintenance/archives/patch-templatelinks-tl_title-nullable.sql
- Where to run those changes: all.dblist
- When to run those changes: Do not run it on s1 yet (until T299424 is done)
- If the schema change is backwards compatible: Yes
- If the schema change has been tested already on some of the test/beta wikis: beta cluster is running with the new schema
- if the data should be made available on the labs replicas and/or dumps: no change of the existing rules
Probably better to simply run it on testwiki first so I can change the config there.
Progress:
- s1: Done
- s2: Done
- s3: Done
- s4: Done
- s5: Done
- s6: Done
- s7: Done
- s8: Done
- labstestwiki