fix: backwards compatibility

frappe/model/naming.py

@@ -198,7 +198,7 @@ def getseries(key, digits):
 	return ('%0'+str(digits)+'d') % current
 
 
-def revert_series_if_last(key, name, doc):
+def revert_series_if_last(key, name, doc=None):
 	if ".#" in key:
 		prefix, hashes = key.rsplit(".", 1)
 		if "#" not in hashes:

frappe/tests/test_document.py

@@ -244,7 +244,7 @@ class TestDocument(unittest.TestCase):
 			prefix = parse_naming_series(prefix)
 			old_current = frappe.db.get_value('Series', prefix, "current", order_by="name")
 
-			revert_series_if_last(series, name, doc)
+			revert_series_if_last(series, name)
 			new_current = cint(frappe.db.get_value('Series', prefix, "current", order_by="name"))
 
 			self.assertEqual(cint(old_current) - 1, new_current)