[fix] unknown column in production order (#10828)

diff --git a/erpnext/patches/v7_1/repost_stock_for_deleted_bins_for_merging_items.py b/erpnext/patches/v7_1/repost_stock_for_deleted_bins_for_merging_items.py
index 321b039..39b7f6c 100644
--- a/erpnext/patches/v7_1/repost_stock_for_deleted_bins_for_merging_items.py
+++ b/erpnext/patches/v7_1/repost_stock_for_deleted_bins_for_merging_items.py
@@ -30,7 +30,7 @@
 		.format(', '.join(['%s']*len(modified_items))), tuple(modified_items)))
 	
 	item_warehouses_with_transactions += list(frappe.db.sql("""
-		select distinct pr_item.item_code, pr.source_warehouse 
+		select distinct pr_item.item_code, pr_item.source_warehouse 
 		from `tabProduction Order` pr, `tabProduction Order Item` pr_item 
 		where pr_item.parent and pr.name and pr.docstatus=1 and pr_item.item_code in ({0})"""
 		.format(', '.join(['%s']*len(modified_items))), tuple(modified_items)))