GST Registration of Divisions of Single Partnership Firm

I have one PAN registered as ABC which is a partnership firm, under which I have XYZ Division of ABC, as a division registered under that PAN in GST
But now the same firm want to add a new division under the same GST number
The new division is in the same state
How Can I add up the new name??
To register XYZ Division, we kept the Legal name as ABC, and trade name as XYZ Division of ABC, please advice how will I add a new Division under the same registration number???