diff --git a/telethon_generator/data/errors.csv b/telethon_generator/data/errors.csv
index d3be7230..bc30807b 100644
--- a/telethon_generator/data/errors.csv
+++ b/telethon_generator/data/errors.csv
@@ -330,6 +330,7 @@ TMP_PASSWORD_DISABLED,400,The temporary password is disabled
 TMP_PASSWORD_INVALID,400,Password auth needs to be regenerated
 TOKEN_INVALID,400,The provided token is invalid
 TTL_DAYS_INVALID,400,The provided TTL is invalid
+TTL_PERIOD_INVALID,400,The provided TTL Period is invalid
 TYPES_EMPTY,400,The types field is empty
 TYPE_CONSTRUCTOR_INVALID,400,The type constructor is invalid
 UNKNOWN_METHOD,500,The method you tried to call cannot be called on non-CDN DCs