1. The property is reported to have been partitioned though by an unregistered partition.
Since there is no dispute among the shareholders in this arrangement of partition and all the shareholders are enjoying their respective share in the propeerty without any problem among themselves.
Therefore the property is deemed to have been partitioned properly and the shareholders can decide to dispose the property in the maner they would like to
2. The signature of all the legal heirs is necessary
They have also to be included as necessary party to the suit.
You may consult your own advocate in this regard.