Advice on legal formalities in executing a deed of declaration

My wife along with her six cousin brothers and sisters owning an undivided joint property where her portion of share was 1/6th of the undivided property . The property was developed jointly under a 50-50 ratio JV and the developer allotted the share through letter of possession to the respective co- sharers . Till that time the partition deed was not done among the co- owners and my wife wanted to separate her share (907 sq.ft) as allotted by the developer. Accordingly as advised by a practicing law professional a gift deed was made in favor of me for the entire area of 907sq.ft. ( undivided property) . Subsequently partition deed was made and as my wife cannot claim entire 907 sq.ft . and only was eligible for undivided 1/6 portion of that property the partition deed was duly rectified empowering my wife 5/6th share & 1/6th share in favor of me . Do , I need to execute any deed of declaration in order to over come the anomaly as already taken place in the gift deed by mistake, without disturbing the partition deed which was with Good faith and understanding was accepted and signed by all other Co- owners . My wife however received the mutation from the authority based on the Registered Partition Deed .