In Kiwi TCMS, test cases cannot be deleted directly through the UI for data integrity reasons, but you can modify test cases by editing their details in the test case view. If you need to remove a test case, the recommended approach is to mark it as "obsolete" or "disabled" instead of deleting it, which keeps the history intact. For bulk changes or deletions, database access and admin-level intervention might be required, but this is generally discouraged. This design ensures audit trails and consistent test management. nulls clash