After registering a VMware Live Recovery (VLR) appliance to vCenter Server, the VLR appliance needs to push its hbr-agent vib to the ESXi hosts. This task can fail with the following error:
A general system error occurred: Offline depot content already exists with ID '####'
Because this task leverages Lifecycle Manager, the vmware-vum-server.log may also show:Offline depot content already exists in the DB with ID : ###########################
Stale metadata from a previous attempt or a database conflict in the VMware Update Manager (VUM) database blocks the registration of the content depot.
To resolve this issue, delete the conflicting depot via the Data Center CLI (dcli).
dcli com vmware esx settings depots offline listdcli com vmware esx settings depots offline delete --depot [ID] --force trueservice-control --restart vmware-updatemgr
If the issue persists, a full reset of the Update Manager database may be required. Refer to KB 316581.