Parent Application Service added to a tag-based Application Service via CSDM wizard would be removed after service recalculationIssue With Application Service Wizard you can create an application service to adhere to CSDM standards. You can select 'Tags' as the Service Population Method and scheduled job 'Populate Calculated Services' is executed once a day to map new tag-based services. If adding a tag-based service as the Parent Application Service to another tag-based server, the parent application service would be removed from the CSDM wizard after execution of 'Populate Calculated Services' job. Steps to reproduce this phenomenon: Navigate to module 'Application Service' under 'CSDM' application.Open CSDM wizard of a tag-based Application Service.At '1.Provide Basic Details' step, find ' Set Relationships' section and click 'Parent Application Service' tab.Move a Parent Application Service from 'Available' list to 'Selected' list.Click Update button to save the change.Now, navigate to module 'Scheduled Jobs' under 'System Definition' application.Search job with name 'Populate Calculated Services' and click 'Execute Now' button.Open the CSDM wizard of the same Application Service in step 2 again.Notice the 'Parent Application Service' added at step 4 is removed from 'Selected' list.CauseThis observed phenomenon is working as designed. The recalculation function implemented by Scheduled Job 'Populate Calculated Services' works as expected as it only includes tagged CIs or CIs brought from traversal rules. The reason is when using CSDM wizard to add Parent Application Service, it's trying to create a manual endpoint from parent service to child service.Because parent service is also a tag-based service, when recalculating service, endpoints for non-tagged / not-traversed CIs are removed.ResolutionIf there is a business needs to demonstrate the relationship between two tag-based services on one dependency map, you can manually create a CI relations between these two tag-based services. In this case, the relationship won't be removed after recalculating service. Below are the basic steps: Navigate to 'CI Relationships' module.Click 'New' to create a new relationship CI.Select the tag-based Application Service for Parent and Child.Select Type of "Depends on::Used by" and save the record. These two tag-based services are shown on the dependency map.Run Scheduled Job 'Populate Calculated Services', the Parent Application Service won't be removed from CSDM wizard afterwards.