Scenario '&1' is active and cannot be deleted

What causes this issue?

This scenario supports scenario-based release. You can only delete such
an integration scenario if you deactivate it beforehand and if the
corresponding configuration requests have been processed successfully.

System Response

The selected scenario cannot be deleted

How to fix this error?

In case you want to delete this scenario you need first to deactivate it
and distribute the corresponding configuration requests to the affected
domain systems. Deletion of scenario will be possible only after
successful processing of the configuration requests in the involved
domain systems.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.