[SOLVED] ownCloud to Nextcloud migration - oc_accounts foreign key constraint fails

[Bernie_O]

@plarwood

I found the foreign key constraint. Is it safe to drop this constraint?

All I can say is, that this query returns an Empty set on my two nextcloud instances. So it looks like it is not needed by nextcloud. Maybe, create a database dump first, drop this constraint and then have a look if the migration runs through successfully

@plarwood

perhaps I should try 12.0.12 instead of 12.0.13?

I would migrate to 12.0.13

@j-ed

You should better try to mirate directly to Nextcloud 14.x/15.x, because
these are supported versions.

This is not possible and not an allowed migration path. Migrations from ownCloud need to go through Nextcloud 12 and then have to be upgraded to supported versions (Migrating from ownCloud — Nextcloud 15 Administration Manual 15 documentation).