Dear G. Mohiuddin,
1. U got this IMM0008 back alongwith ur Med+PPR+RPRF means that there Might Not Be an impact on ur case.
2. But u r duty bound to correct it & resend it. It's not a formality.
3. The CIC has marked it for u. So, only do that change/s & send back.
Seeing ur repeated posts on the matter, I only hope that the mistake u did was unintentional & not a grave misrepresentation of facts. 'Coz, if that be the case, things might be looked differently by the CIC. Else, it is a simple thing, which doesn't require much deliberation. Ur case should go fine on it.
I wish u all the very best.
Regards.