fix: user doctype singles issue

lms/patches/v0_0/user_singles_issue.py

@@ -0,0 +1,7 @@
+import frappe
+
+def execute():
+	rows = frappe.db.sql("select field from `tabSingles` where doctype='User'", as_dict = True)
+
+	if len(rows):
+		frappe.db.sql("delete from `tabSingles` where doctype='User'")