The upgrade contains the following set of conflicting VIB's: CIsco_bootbank_cisco-vem-v 152-esx_4.2.1.2.1.1a.0-3.01

8 Host Cluster (IBM HS23 Blades) ESXI 5.0 using Cisco Nexus 1000v.

Attempting to upgrade to 5.1 using Update Manager.

error: The upgrade contains the following set of conflicting VIB's: CIsco_bootbank_cisco-vem-v 152-esx_4.2.1.2.1.1a.0-3.01 

Please note that we are using an IBM ESXI 5.1 ISO so I can not add the vib.

what is the best way to update the hosts to ESXI 5.1 using the IBM image.