diff --git a/erpnext/patches/v15_0/rename_sla_fields.py b/erpnext/patches/v15_0/rename_sla_fields.py
index e5e69e0921e..6a7439ad257 100644
--- a/erpnext/patches/v15_0/rename_sla_fields.py
+++ b/erpnext/patches/v15_0/rename_sla_fields.py
@@ -9,10 +9,10 @@ def execute():
 		if doctype == "Issue":
 			continue
 
-		if frappe.db.exists("Custom Field", {"fieldname": doctype + "-resolution_by"}):
+		if frappe.db.exists("Custom Field", {"name": doctype + "-resolution_by"}):
 			rename_fieldname(doctype + "-resolution_by", "sla_resolution_by")
 
-		if frappe.db.exists("Custom Field", {"fieldname": doctype + "-resolution_date"}):
+		if frappe.db.exists("Custom Field", {"name": doctype + "-resolution_date"}):
 			rename_fieldname(doctype + "-resolution_date", "sla_resolution_date")
 
 	rename_field("Issue", "resolution_by", "sla_resolution_by")