fix: don't allow negative rates (#36027)

* fix: don't allow negative rate

* test: don't allow negative rate

* fix: only check for -rate on items child table

erpnext/controllers/status_updater.py

@@ -233,6 +233,9 @@ class StatusUpdater(Document):
 				if hasattr(d, "qty") and d.qty > 0 and self.get("is_return"):
 					frappe.throw(_("For an item {0}, quantity must be negative number").format(d.item_code))
 
+				if hasattr(d, "item_code") and hasattr(d, "rate") and d.rate < 0:
+					frappe.throw(_("For an item {0}, rate must be a positive number").format(d.item_code))
+
 				if d.doctype == args["source_dt"] and d.get(args["join_field"]):
 					args["name"] = d.get(args["join_field"])