You can use version controlled source code for you databricks job and each time you need to rollback to older version of your job you need just to move to older version code. For version controlled source code you have multiple choises:
-  Use a notebook from a remote Git repository
- Use Python code from a remote Git repository
- Use SQL queries from a remote Git repository
https://docs.databricks.com/en/workflows/jobs/how-to/use-repos.html