Stamp and registration related issue

A "registered" gift deed in which the lands to be gifted is undervalued(by mistake)and facts of land which effect the stamp duty are partially wrong or omitted (by mistake) such as location suppose if total no of 14 lands are transferred out of which 5 located roadside.so my question is 1)can registration of gift be declared invalid if challenged in court by someone 2) what is the procedure to rectify it