patch file
diff --git a/erpnext/patches/task_email_notification.py b/erpnext/patches/task_email_notification.py
new file mode 100644
index 0000000..e6a7afa
--- /dev/null
+++ b/erpnext/patches/task_email_notification.py
@@ -0,0 +1,4 @@
+def execute():
+	import webnotes
+	from webnotes.modules.module_manager import reload_doc
+	reload_doc('projects', 'doctype', 'ticket')