[fix] fix filter in previous link mapper
diff --git a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
index 1e02415..de65485 100644
--- a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
+++ b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
@@ -49,7 +49,7 @@
 				"fieldname": "purchase_receipt",
 				"doctype": "Purchase Invoice Item",
 				"filters": [
-					["Purchase Invoice Item", "parent", "=", self.item],
+					["Purchase Invoice Item", "parent", "=", self.name],
 					["Purchase Invoice Item", "purchase_receipt", "!=", ""]
 				]
 			}