fix: validation trigger

erpnext/manufacturing/doctype/bom/bom.py

@@ -1018,6 +1018,10 @@ def validate_operations(self):
 				if not d.batch_size or d.batch_size <= 0:
 					d.batch_size = 1
 
+				if not d.workstation and not d.workstation_type:
+					msg = f"Row {d.idx}: Workstation or Workstation Type is mandatory for an operation {d.operation}"
+					frappe.throw(_(msg))
+
 	def get_tree_representation(self) -> BOMTree:
 		"""Get a complete tree representation preserving order of child items."""
 		return BOMTree(self.name)

erpnext/manufacturing/doctype/work_order/work_order.py

@@ -191,10 +191,16 @@ def reset_use_multi_level_bom(self):
 			self.get_items_and_operations_from_bom()
 
 	def validate_workstation_type(self):
+		if not self.docstatus.is_submitted():
+			return
+
 		for row in self.operations:
 			if not row.workstation and not row.workstation_type:
-				msg = f"Row {row.idx}: Workstation or Workstation Type is mandatory for an operation {row.operation}"
-				frappe.throw(_(msg))
+				frappe.throw(
+					_("Row {0}: Workstation or Workstation Type is mandatory for an operation {1}").format(
+						row.idx, row.operation
+					)
+				)
 
 	def validate_sales_order(self):
 		if self.sales_order: