GroupInfo.AddUserLeftError

Sorry, if a person is no longer part of a group, you need to add each other to your respective contact lists to be able to add them back.

Note that they could still join via the group's invite link as long as they are not
in their Telegram contacts in order to add them back.

Note that they can still join via
the group's invite link as long as they are not in the Removed Users list.
249
Applied
指定した相手を戻すには相手をTelegramの連絡先に登録している必要があります。

指定した相手に制限がなければ招待リンクによる再登録の呼びかけも可能です。
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テレグラム同好会, Aug 24, 2020 at 11:16