diff --git a/compiler/errors/source/403_FORBIDDEN.tsv b/compiler/errors/source/403_FORBIDDEN.tsv
index add636a5..deff1e84 100644
--- a/compiler/errors/source/403_FORBIDDEN.tsv
+++ b/compiler/errors/source/403_FORBIDDEN.tsv
@@ -4,6 +4,7 @@ CHANNEL_PUBLIC_GROUP_NA	The channel/supergroup is not available
 CHAT_ADMIN_INVITE_REQUIRED	You don't have rights to invite other users
 CHAT_ADMIN_REQUIRED	The method requires chat admin privileges
 CHAT_FORBIDDEN	You cannot write in this chat
+CHAT_GUEST_SEND_FORBIDDEN	You need to join the discussion group before commenting
 CHAT_SEND_GIFS_FORBIDDEN	You can't send animations in this chat
 CHAT_SEND_INLINE_FORBIDDEN	You cannot use inline bots to send messages in this chat
 CHAT_SEND_MEDIA_FORBIDDEN	You can't send media messages in this chat