Thank you for you help and suggestions. It was really easy to fix it. I do not know why I did not do it before. I have deselected all VM's and selected again those which are needed. It looks like there was some old entries somewhere and it cleared it. 
Hi, I'm new here, so please forgive me mistakes. I have a problem with a false backup / workflow failure. On the monitoring tab, I notice that the VMWare backup failed, but in detail I see that all virtual machines were successfully created. So I looked into the logs and discovered the following entries: 09/16/19 02:00:09 Unable to find selected vCenter container work item with ID "resgroup-4822" in vCenter, the work item will be skipped.09/16/19 02:00:09 Unable to find selected vCenter container work item with ID "resgroup-2406" in vCenter, the work item will be skipped. The group details shows me: nsrpolicy group display -g DRS_DC1_Servicestype: NSR Protection Group;administrator: *@*backup optimization: Capacity;comment: ;name: DRS_DC1_Services;protection group list: ;restricted data zone: ;work item query: ;work item source: static;work item subtype: All;work item type: vmware;work items: \"{\"vcenter_name\":\"vcs1\",\"clients\":[{\"moref-id\":\"vm-14001\",\"type\":\"\VirtualMachine\",\"uuid\":\"5027f401-5a31-f276-d550-794bc08ede28\"},{\"moref-i\d\":\"vm-71248\",\"type\":\"VirtualMachine\",\"uuid\":\"50269636-0fe3-86fd-087\2-e1bd1a48cbdd\"},{\"moref-id\":\"vm-83908\",\"type\":\"VirtualMachine\",\"uui\d\":\"5026fc75-6e64-5519-1b70-847a5f22db21\"},{\"moref-id\":\"vm-960\",\"type\"\:\"VirtualMachine\",\"uuid\":\"5022f031-97dc-34b3-7529-142150bf46c3\"},{\"more\f-id\":\"resgroup-2406\",\"type\":\"ResourcePool\"},{\"moref-id\":\"resgroup-4\822\",\"type\":\"ResourcePool\"}]}";work items disabled: ;   I am not sure what for those 2 are. Can you please help me to fix it or just remove? It is anoinyg to see every day a failed backup when it is working properly. I have tried to update the group and remove it via CLI: nsrpolicy group update vmware -g DRS_DC1_Services -O resgroup-2406
Fake failed backup due to bad resource pool.