Update from latest 13 branch to Nextcloud 14 Beta 2 crashes

InvalidArgumentException: Index name "oc_mail_collected_addresses"."mail_collected_addr_userid_index" is too long.

Update vorbereiten
Log-Level auf "debug" gesetzt
Wartungsmodus eingeschaltet
Das Datenbankschema wird aktualisiert
InvalidArgumentException: Index name "oc_mail_collected_addresses"."mail_collected_addr_userid_index" is too long.

Neither works via the command line via ./occ upgrade BTW...

[nextcloud-bot]

GitMate.io thinks possibly related issues are #10410 (Nextcloud 14 Beta 2), #10495 (14 Beta 2), #10517 (Upgrade to Nextcloud 14 beta 2 fails), #8965 (update from 13 to 13.01 NextCloud not working anymore), and #8768 (oc_phonetrack_points crash Nextcloud after update).

[MartB]

duplicate of nextcloud/mail#1002 or #10518

[rullzer]

Yep lets continue in #10518