Hello. I am using Owncloud 9.0.x and wish to upgrade to Owncloud 9.1.x. I notice on the 9.1.x release notes that:-
"Removed dav:migrate-calendars and dav:migrate-addressbooks commands for occ. Users planning to upgrade from oC 9.0 or below to oC 9.1 needs to make sure that their Calendars and Adressbooks are correctly migrated before continuing to upgrade to 9.1."
I use the address books feature of 9.0.x. How do I upgrade to Owncloud 9.1.x and keep my address books please?