Frappe cloud erpnext version 12 to 13 update fails due to duplicate entry in BIN doctype

While updating our frappecloud based erpnext ver 12 to version 13 we are facing error 1062, in which BIN doctype has multiple entry for a same product for same warehouse, pls guide us how to resolve this as bin doctype no change is possible, we want to delete a single entry from BIN doctype.

can anybody help on this