Current structure of stock transfer within own stores is operational through Transfer In & Transfer Out.
This result in increasing the turnover as it shoots up the sales in the GSTR1 and when checked the sales for any company.
GRT from Store is treated as Purchase in HO for returning good from POS which is treated as Purchase in GST as well.
By giving credit note for Own store will nullify the impact of sales while returning back through GST credit note channel as per GST compliance.