diff --git a/erpnext/venue/doctype/event_registration/event_registration.py b/erpnext/venue/doctype/event_registration/event_registration.py
index 32518b04753ccfdbf2991295bd8ec3f045a87eb0..a52aed3aa51df19cc8461a1796ab7b4dcbc683a3 100644
--- a/erpnext/venue/doctype/event_registration/event_registration.py
+++ b/erpnext/venue/doctype/event_registration/event_registration.py
@@ -598,7 +598,9 @@ def cancel_registration(event):
 	if not event.allow_cancellations:
 		raise frappe.exceptions.ValidationError()
 
-	docname = frappe.get_value("Event Registration", dict(user=user, event=event, docstatus=1))
+	docname = frappe.db.get_value(
+		"Event Registration", dict(user=user, event=event.name, docstatus=1)
+	)
 	if docname:
 		doc = frappe.get_doc("Event Registration", docname)
 		doc.flags.ignore_permissions = True