What you'll achieve
You can inspect the proposed route changes and promote only a conflict-free change set.
Create, review and promote a change set
Open the Configuration sandbox available to your workspace and create a named change set for Routing.
Edit the routing draft, then review each changed path in the diff instead of editing the live route at the same time.
Promote only after the diff is correct. Resolve a conflict in the live configuration first, then create or update the change set again.