Civil matter

This is more of a riddle than a query!

A lease hold property purchased for lease price Rs1200/- in 1966 from Govt Odisha by my father died intestate in 2002 leaving behind legal heirs myself (son), 3 married daughters living in rich family and widow wife.

In 2011 the above 3 married sisters and widow mother relinquished the above property in my favour by executing registered deed mentioning out of free will in deed and signing on the deed in front of Govt Camera and Sub Registrar.

On the basis of above registered relinquished deed and premium of Rs1500000/- paid by me to Govt as conversion fee from lease hold to free hold, the Government Odisha issued Patta ROR in my favour in 2012 as sole owner of the property with all reversionary rights.

The sisters have taken Rs3000000/- in cash from me by hook or by crook by exploiting fraternal emotions.

Now, in 2020 above 3 married sisters are demanding exorbitant money from me or else threatening me to sue me in court of law and cancel the registered relinquished deed.

Can a registered relinquished deed executed in 2011 out of free will be cancelled in 2020 by 3 executants (sisters) when the other executant (my widow mother) and the beneficiary (myself) do not give consent for cancellation and also in view of issue of Patta ROR by Government in my favour as sole owner with all reversionary rights and duly converting propertyromrom lease hold to free hold on receiving Govt conversion fee Rs1500000/- from me including conducting bonafide verification of the relinquished deed and not obtaining any complaint within due time of Government notification?

Your valuable jurisprudence on the matter is highly solicited.

Regards.
sachirath4@gmail.com
Mobile no.9692089815

Respected Om Prakash,
Thank you for your information correcting my ignorance.