First beta of Nextcloud 28

I have two beta instances:

[A] with a bare minimum of apps (not even all core apps) – occ upgrade from latest 27 to 28.0.0beta1 worked out just fine.

[B] with any app installed that I found remotely interesting – occ upgrade from latest 27 to 28.0.0beta1 led to the result reported by eehmke.

Is @blizzz proposed, these steps did help:

  • drop index ts_session on oc_talk_sessions;
  • ./occ upgrade
  • ./occ db:add-missing-indices

(although, according to /settings/admin/overview, there were no missing indices)

My conclusion: Some migration is broken and needs to be fixed. I expect any instance to break that went through all(!) 27 (beta) versions.

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