Functionality Bug: Adding duplicate cases to archive with different statuses

This issue reports a functionality bug where it is possible to add a duplicate case with the same title but different status to the archive. Upon changing statuses, the application raises an unhandled error.

Steps to reproduce:
1. Start the application.
2. Run `add case t:1`.
3. Run `list archive`.
4. Run `add case t:1 s:closed`.
5. Notice that although we expect "This case already exists in PIVOT", the command passes and a duplicate case with the same name, albeit with different status, is created.
6. Run `open case 1`.
7. Run `edit status s:active`.
8. Notice that the command does not raise an error message in the application but raises an unhandled error.

Screenshot:

Severity: High