Those alerts can be generated when you have service profiles or service profile templates, referencing lan connectivity policies, ,,,,, and the lan connectivity policy got deleted globally without first removing them from the the service profile/service profile templates.
You can also get similar alerts when a vlan is deleted globally, but still being referenced in vnic templates, connectivity policies, service profiles.
You will need to check where ESXi_VM_DevTracB is being referenced in connectivity policy ESXi_LAN_Con_Pol, service profile ESXi_Templ, ESXi_Hypervisor-1
You may need to remove vlan ESXi_VM_DevTracB from your lan connectivity policy 'ESXi_LAN_Con_Po', which in turn will remove the vlan from the linked service profiles that use the lan connectivity policy.
Kirk...