fix: make `BOM` required in SCR Item
diff --git a/erpnext/controllers/subcontracting_controller.py b/erpnext/controllers/subcontracting_controller.py
index aa4468c..8d67e30 100644
--- a/erpnext/controllers/subcontracting_controller.py
+++ b/erpnext/controllers/subcontracting_controller.py
@@ -89,6 +89,9 @@
 				if bom.item != item.item_code:
 					msg = f"Please select an valid BOM for Item {item.item_name}."
 					frappe.throw(_(msg))
+			else:
+				msg = f"Please select a BOM for Item {item.item_name}."
+				frappe.throw(_(msg))
 
 	def __get_data_before_save(self):
 		item_dict = {}
diff --git a/erpnext/subcontracting/doctype/subcontracting_receipt/subcontracting_receipt.py b/erpnext/subcontracting/doctype/subcontracting_receipt/subcontracting_receipt.py
index cd05b74..bce5360 100644
--- a/erpnext/subcontracting/doctype/subcontracting_receipt/subcontracting_receipt.py
+++ b/erpnext/subcontracting/doctype/subcontracting_receipt/subcontracting_receipt.py
@@ -57,6 +57,7 @@
 
 	def before_validate(self):
 		super(SubcontractingReceipt, self).before_validate()
+		self.set_items_bom()
 		self.set_items_cost_center()
 		self.set_items_expense_account()
 
@@ -193,6 +194,24 @@
 					).format(item.idx)
 				)
 
+	def set_items_bom(self):
+		if self.is_return:
+			for item in self.items:
+				if not item.bom:
+					item.bom = frappe.db.get_value(
+						"Subcontracting Receipt Item",
+						{"name": item.subcontracting_receipt_item, "parent": self.return_against},
+						"bom",
+					)
+		else:
+			for item in self.items:
+				if not item.bom:
+					item.bom = frappe.db.get_value(
+						"Subcontracting Order Item",
+						{"name": item.subcontracting_order_item, "parent": item.subcontracting_order},
+						"bom",
+					)
+
 	def set_items_cost_center(self):
 		if self.company:
 			cost_center = frappe.get_cached_value("Company", self.company, "cost_center")