sorry for the delay .....
I deleted the CvFailoverLogshipping subclient in both instances and ran the configurefailover.
this now recreates the subclients (content correct) but throughs an error "unable to create subclient".
Nevertheless this subclient again has "IntelliSnap" enabled and that cannot be deactivated.
For Archivelog subclients on Oracle, I got a qscript to uncheck the IntelliSnap Feature, but this does not work for the SQL Server subclient :(