deed of rectification is not required as there is no mistake in sales deed
2) the Registering Officer has no power or authority to modify or delete any entries made in Book I or in the Indexes relating to Book I, by holding an enquiry relating to the validity of the document. Consequently, he cannot delete or modify any entry made in an Encumbrance Certificate (except where it may relate to a clerical error).
3) approach registrar for correcting the entry number
4) if he refuses file writ petition in HC to direct registrar to correct entry number in its records