Hi Manzar,
In V51.0.5.0 we just released the first phase of tracking changes in playbooks, we'll have further updates in Q3 which will give more visibility to the changes.
https://www.ibm.com/docs/en/sqsp/51.0.0?topic=playbooks-new-in-51050-viewing-playbook-change-logs
Theres no rollback to previous versions today, unless you possibly have an exported copy of a previous version that you could re-import.
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Martin Feeney
Product Manager, IBM Security QRadar SOAR
martin.feeney@ie.ibm.com------------------------------