Hi Rajendra,
I assume you use the Express ECO. Is your Express ECO still In 'In Work' or already finished? Unfortunately the standard Express ECO don´t come up with a rollback feature. There are partner mods available for this one or you can also to it by yourself.
A not very pretty but working solution is to manipulate the Affected Items inside the Express ECO so they will link to the correct Part revisions. Be aware that it´s a risky solution, cause you have to take care that your Express ECO still works in the end (e.g. item states have to be correct, etc.).
