question Tag Based Discovery Issue in Developer forum

Tag Based Discovery Issue

SandeepKSingh — Sat, 23 Aug 2025 04:53:06 GMT

Hello,

I'm currently implementing tag-based Service Mapping in ServiceNow.

However, our CMDB already contains several Application Services, and some of them match the services that are about to be discovered through tag-based mapping.

When I attempt to use "Map Selected," ServiceNow prevents the mapping because an Application Service with the same name already exists.

I'm considering two possible approaches:

Reuse and convert the existing Application Service into a tag-based service through Service Mapping.
Rename the existing Application Service to allow Service Mapping to create a new one, and then establish a process to merge the two services.

Re: Tag Based Discovery Issue

Ravi Gaurav — Sat, 23 Aug 2025 05:15:16 GMT

Hi @SandeepKSingh
-----------------

Converting an Application Service to a Tag-based Service

Open the Application Service record.
- Be sure to use the 3-step wizard view, not the legacy form (same view used when creating a new Application Service).
Go to Step 2 of the wizard.
Click Choose a Method.
Select Tags as the method.
Enter the required tag information.
Click Save.
Click Update to finalize.

The Application Service (cmdb_ci_service_auto) is now converted into a Tag-based Application Service (cmdb_ci_service_by_tags).

Important: This action is not reversible. Once converted, you cannot switch the service back to cmdb_ci_service_auto.

Re: Tag Based Discovery Issue

SandeepKSingh — Sat, 23 Aug 2025 06:26:15 GMT

Thanks @Ravi Gaurav
Its really Helped me a lot .

Re: Tag Based Discovery Issue

chaithra10 — Wed, 25 Mar 2026 13:05:59 GMT

But after converting the existed manual app servce to "Tag-based" the old rels and associated svc_ci_assoc records are broken and manual end points are deleted and they fail to appear on Inc, CHG forms.. anyone facing the same issue?