diff --git a/td/generate/scheme/td_api.tl b/td/generate/scheme/td_api.tl
index 6ab21e84d..7c6f04dd3 100644
--- a/td/generate/scheme/td_api.tl
+++ b/td/generate/scheme/td_api.tl
@@ -3664,7 +3664,7 @@ getCreatedPublicChats type:PublicChatType = Chats;
 //@description Checks whether the maximum number of owned public chats has been reached. Returns corresponding error if the limit was reached @type Type of the public chats, for which to check the limit
 checkCreatedPublicChatsLimit type:PublicChatType = Ok;
 
-//@description Returns a list of basic group and supergroup chats, which can be used as a discussion group for a channel. Basic group chats need to be first upgraded to supergroups before they can be set as a discussion group
+//@description Returns a list of basic group and supergroup chats, which can be used as a discussion group for a channel. Returned basic group chats must be first upgraded to supergroups before they can be set as a discussion group. To set a returned supergroup as a discussion group, access to its old messages must be enabled using toggleSupergroupIsAllHistoryAvailable first
 getSuitableDiscussionChats = Chats;
 
 //@description Returns a list of recently inactive supergroups and channels. Can be used when user reaches limit on the number of joined supergroups and channels and receives CHANNELS_TOO_MUCH error
@@ -4109,7 +4109,7 @@ setChatClientData chat_id:int53 client_data:string = Ok;
 setChatDescription chat_id:int53 description:string = Ok;
 
 //@description Changes the discussion group of a channel chat; requires can_change_info rights in the channel if it is specified @chat_id Identifier of the channel chat. Pass 0 to remove a link from the supergroup passed in the second argument to a linked channel chat (requires can_pin_messages rights in the supergroup) @discussion_chat_id Identifier of a new channel's discussion group. Use 0 to remove the discussion group.
-//-Use the method getSuitableDiscussionChats to find all suitable groups. Basic group chats need to be first upgraded to supergroup chats. If new chat members don't have access to old messages in the supergroup, then toggleSupergroupIsAllHistoryAvailable needs to be used first to change that
+//-Use the method getSuitableDiscussionChats to find all suitable groups. Basic group chats need to be first upgraded to supergroup chats. If new chat members don't have access to old messages in the supergroup, then toggleSupergroupIsAllHistoryAvailable must be used first to change that
 setChatDiscussionGroup chat_id:int53 discussion_chat_id:int53 = Ok;
 
 //@description Changes the location of a chat. Available only for some location-based supergroups, use supergroupFullInfo.can_set_location to check whether the method is allowed to use @chat_id Chat identifier @location New location for the chat; must be valid and not null