Replicate the below catalogs from the patch channel onto the ZENworks server:
OES2018-SP2-Pool
OES2018-SP2-Updates
OES2018-SP2-SLES12-SP5-Pool
OES2018-SP2-SLES12-SP5-Updates
OES2018-SP2-SLE-Module-Containers12-Pool
OES2018-SP2-SLE-Module-Containers12-Updates
For more information on creating and replicating subscriptions, see Section II, Subscriptions. After replication, assign the bundles to the OES 2018 SP1 server.