after upgrading to v11 i found double birthday entries in my calendar. It turned out that i had double entries in my address book even though i couldn’t see them.
Examing the database i found out that my default address book is two time in the database (select from oc_addressbooks).
id, principaluri, displayname, uri, description, synctoken '3', 'principals/users/649d6360-c19e-1034-9558-9b8475e7168c', 'default', 'default', NULL, '167' '4', 'principals/users/pressy', 'default', 'default', NULL, '946'
The one with id = 3 is the false one (i change the birthdate of the contact und queried which entry was change).
How do I get savely rid of this old address book? Is it save to delete this row and all entries in oc_cards and oc_cards_properties with this addressbookid?
PS: I have ldap-user-backend enabled