For CCVPN - transport slicing use case, we need to create two connectivity nodes under one service-instance.  However the current edge rule (defined in DbEdgeRules_ccvpn_v21.json) only allows one-to-many relation between connectivity and service-instance.  i.e., the following error occurs when trying to add a 2nd connectivity node to a service-instance:

{"requestError":{"serviceException":

{"messageId":"SVC3000","text":"Invalid input performing %1 on %2 (msg=%3) (ec=%4)","variables":["PUT_EDGE","business/customers/customer/5GCustomer/service-subscriptions/service-subscription/5G/service-instances/service-instance/3a0e06b5-a235-4df9-a95e-acbf9a369b9a","Edge multiplicity violated:multiplicity rule violated: only one edge can exist with label: org.onap.relationships.inventory.PartOf between connectivity and service-instance","ERR.5.4.6140"]}

}}