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Thanks! That helps a lot.

In my case it was Postgres 13 and 16:

pg_lsclustersVer Cluster Port Status Owner    Data directory              Log file13  main    5432 online postgres /var/lib/postgresql/13/main /var/log/postgresql/postgresql-13-main.log16  main    5433 online postgres /var/lib/postgresql/16/main /var/log/postgresql/postgresql-16-main.log

Sad that the migration doesn’t do the job, i tried:

yunohost tools migrations run postgresql_13_to_15 --force-rerun

But it just ran into an error. Think it’s not so robust to handle my mixed case.

I doesn’t used your idea with manually SQL dump/restore. What i have done was:

  1. Backup of all Apps that still used postgres 13
  2. Deinstall these apps
  3. Stop the v13 cluster
  4. changed the port of v16
  5. deinstalled v13
  6. restore the Apps

After this, all apps used v16 and i can apply the missing app updates.

EDIT: One missing part seems to change the postgres version in /etc/postgresql-common/user_clusters