Mother Registry Has wrong details which needs to ve rectified

Hello, Details: Mother registry details are incorrect by mistake and two parties living in the property are conflicted, in INDORE,MP I am reaching out to you for advising this case that my father is going through. My father (Party1- our family) and his brother (Party2 -uncle’s family) we share the same land and have conjoint bunglows. The issue with Mother registration is that instead of a valid 5 digit endorsement number of the plot, by mistake there is a wrong e-registry number. But now the registrar is denying that it’s his sign ( he is scared of Party2 and is denying to avoid any charges) There are two unique IDs of the sale deed, but the mother registry had this clause that the main mother registry (original copy) is only in the name of Party1. Now party2 having the duplicate copy is claiming this to be wrong after 10 years (This was verbally aligned between both parties, but now party2 denies) Current Sitution: Party2 is willing to put a case on Party1( my father) as the number is wrong or document is invalid. But this is not his fault, this is may be the registrar human error. What should We do in this case? We are ready to resolve the document but according to party2 mother document cannot be rectified and has made his mind up to file a case and