How to mark contracts that will never be renewed?

[Community Alums]

Hi Community,
My customer has expired contracts (in ast_contract) that he does not want to renew.
He wants to differentiate between expired contracts to renew and those that he will not renew anymore.
I see sub-states but I'm not sure if there is a corresponding one
https://www.servicenow.com/docs/bundle/xanadu-it-asset-management/page/product/contract-management/c...

Do you know how to mark contracts that will never be renewed? 

Thanks
Christophe

[Community Alums]

Thanks Runjay, 

Using a sub-state is a possibility. To avoid changing the process and OOB values, can I ask the user to make a renewal request (click on Renew) and the approver rejects (it's the same person in my case). So the contract ends up in the "expired" state and "Extension Rejected" sub-state.
If one day they want to reactivate it, they make a new renewal request.

What do you think?