Group.Username.RemoveExistingUsernamesInfo

Sorry, yYou have reserved too many public usernames.
You can revoke
links. Try revoking the link from an older group or channel, or create a private one of your older groups or channels, or create a private entity instead.
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César, Dec 12, 2018 at 17:07
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César, Mar 20, 2019 at 21:53