diff --git a/Telegram/SourceFiles/boxes/peers/edit_peer_info_box.cpp b/Telegram/SourceFiles/boxes/peers/edit_peer_info_box.cpp
index 4dd9f9eff..2af61065b 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_peer_info_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/edit_peer_info_box.cpp
@@ -161,6 +161,7 @@ private:
 	object_ptr<Ui::RpWidget> createPhotoEdit();
 	object_ptr<Ui::RpWidget> createDescriptionEdit();
 	void refreshHistoryVisibility(bool instant);
+	void showEditPeerTypeBox(std::optional<LangKey> error = std::nullopt);
 	void fillPrivacyTypeButton();
 	void fillInviteLinkButton();
 	void fillSignaturesButton();
@@ -217,6 +218,8 @@ private:
 	std::deque<FnMut<void()>> _saveStagesQueue;
 	Saving _savingData;
 
+	const rpl::event_stream<Privacy> _updadePrivacyType;
+
 	rpl::lifetime _lifetime;
 
 };
@@ -395,10 +398,26 @@ void Controller::refreshHistoryVisibility(bool instant = false) {
 		return;
 	}
 	_controls.historyVisibilityWrap->toggle(
-		_privacySavedValue == Privacy::Private,
+		_privacySavedValue != Privacy::Public,
 		instant ? anim::type::instant : anim::type::normal);
 };
 
+void Controller::showEditPeerTypeBox(std::optional<LangKey> error) {
+	const auto boxCallback = [=](Privacy checked, QString publicLink) {
+		_updadePrivacyType.fire(std::move(checked));
+		_privacySavedValue = checked;
+		_usernameSavedValue = publicLink;
+		refreshHistoryVisibility();
+	};
+	Ui::show(Box<EditPeerTypeBox>(
+		_peer,
+		boxCallback,
+		_privacySavedValue,
+		_usernameSavedValue,
+		error
+		), LayerOption::KeepOther);
+}
+
 void Controller::fillPrivacyTypeButton() {
 	Expects(_controls.buttonsLayout != nullptr);
 	// Create Privacy Button.
@@ -407,21 +426,8 @@ void Controller::fillPrivacyTypeButton() {
 		? Privacy::Public
 		: Privacy::Private;
 
-	const auto updateType = std::make_shared<rpl::event_stream<Privacy>>();
-
-	const auto boxCallback = [=](Privacy checked, QString publicLink) {
-		updateType->fire(std::move(checked));
-		_privacySavedValue = checked;
-		_usernameSavedValue = publicLink;
-		refreshHistoryVisibility();
-	};
 	const auto buttonCallback = [=] {
-		Ui::show(Box<EditPeerTypeBox>(
-			_peer,
-			boxCallback,
-			_privacySavedValue,
-			_usernameSavedValue
-			), LayerOption::KeepOther);
+		showEditPeerTypeBox();
 	};
 
 	AddButtonWithText(
@@ -430,7 +436,7 @@ void Controller::fillPrivacyTypeButton() {
 			? lng_manage_peer_group_type
 			: lng_manage_peer_channel_type)),
 
-		updateType->events(
+		_updadePrivacyType.events(
 		) | rpl::map([](Privacy flag) {
 		return lang(Privacy::Public == flag
 			? lng_manage_public_peer_title
@@ -438,7 +444,7 @@ void Controller::fillPrivacyTypeButton() {
 	}),
 		buttonCallback);
 
-	updateType->fire(std::move(_privacySavedValue.value()));
+	_updadePrivacyType.fire(std::move(_privacySavedValue.value()));
 }
 
 void Controller::fillInviteLinkButton() {
@@ -915,12 +921,12 @@ void Controller::saveUsername() {
 				return lng_create_channel_link_invalid;
 			} else if (type == qstr("USERNAME_OCCUPIED")
 				|| type == qstr("USERNAMES_UNAVAILABLE")) {
-				return lng_create_channel_link_invalid;
+				return lng_create_channel_link_occupied;
 			}
 			return lng_create_channel_link_invalid;
 		}();
-		// Probably never happend.
-		// showUsernameError(Lang::Viewer(errorKey));
+		// Very rare case.
+		showEditPeerTypeBox(errorKey);
 		cancelSave();
 	}).send();
 }
diff --git a/Telegram/SourceFiles/boxes/peers/edit_peer_type_box.cpp b/Telegram/SourceFiles/boxes/peers/edit_peer_type_box.cpp
index d53a62179..8cf9dc2ac 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_peer_type_box.cpp
+++ b/Telegram/SourceFiles/boxes/peers/edit_peer_type_box.cpp
@@ -52,7 +52,8 @@ public:
 		not_null<Ui::VerticalLayout*> container,
 		not_null<PeerData*> peer,
 		std::optional<Privacy> privacySavedValue,
-		std::optional<QString> usernameSavedValue);
+		std::optional<QString> usernameSavedValue,
+		std::optional<LangKey> usernameError);
 
 	void createContent();
 	QString getUsernameInput();
@@ -139,6 +140,7 @@ private:
 	not_null<PeerData*> _peer;
 	std::optional<Privacy> _privacySavedValue = std::nullopt;
 	std::optional<QString> _usernameSavedValue = std::nullopt;
+	std::optional<LangKey> _usernameError = std::nullopt;
 
 	bool _isGroup = false;
 	bool _isInviteLink = false;
@@ -158,10 +160,12 @@ Controller::Controller(
 	not_null<Ui::VerticalLayout*> container,
 	not_null<PeerData*> peer,
 	std::optional<Privacy> privacySavedValue,
-	std::optional<QString> usernameSavedValue)
+	std::optional<QString> usernameSavedValue,
+	std::optional<LangKey> usernameError)
 : _peer(peer)
 , _privacySavedValue(privacySavedValue)
 , _usernameSavedValue(usernameSavedValue)
+, _usernameError(usernameError)
 , _isGroup(_peer->isChat() || _peer->isMegagroup())
 , _isInviteLink(!_privacySavedValue.has_value() && !_usernameSavedValue.has_value())
 , _isAllowSave(!_usernameSavedValue.value_or(QString()).isEmpty())
@@ -204,6 +208,13 @@ void Controller::createContent() {
 	if (_controls.privacy->value() == Privacy::Private) {
 		checkUsernameAvailability();
 	}
+
+	if (_usernameError.has_value()) {
+		showUsernameError(Lang::Viewer(_usernameError.value()));
+		// Not focused actually.
+		_controls.usernameInput->setDisplayFocused(true);
+		setFocusUsername();
+	}
 }
 
 
@@ -508,6 +519,7 @@ void Controller::usernameChanged() {
 }
 
 void Controller::showUsernameError(rpl::producer<QString> &&error) {
+	_isAllowSave = false;
 	showUsernameResult(std::move(error), &st::editPeerUsernameError);
 }
 
@@ -720,11 +732,13 @@ EditPeerTypeBox::EditPeerTypeBox(
 		not_null<PeerData*> peer,
 		FnMut<void(Privacy, QString)> savedCallback,
 		std::optional<Privacy> privacySaved,
-		std::optional<QString> usernameSaved)
+		std::optional<QString> usernameSaved,
+		std::optional<LangKey> usernameError)
 : _peer(peer)
 , _savedCallback(std::move(savedCallback))
 , _privacySavedValue(privacySaved)
-, _usernameSavedValue(usernameSaved) {
+, _usernameSavedValue(usernameSaved)
+, _usernameError(usernameError) {
 }
 
 void EditPeerTypeBox::prepare() {
@@ -737,7 +751,8 @@ void EditPeerTypeBox::prepare() {
 		content,
 		_peer,
 		_privacySavedValue,
-		_usernameSavedValue);
+		_usernameSavedValue,
+		_usernameError);
 	_focusRequests.events(
 	) | rpl::start_with_next(
 		[=] { controller->setFocusUsername(); },
diff --git a/Telegram/SourceFiles/boxes/peers/edit_peer_type_box.h b/Telegram/SourceFiles/boxes/peers/edit_peer_type_box.h
index c3ff28d4f..38dad0075 100644
--- a/Telegram/SourceFiles/boxes/peers/edit_peer_type_box.h
+++ b/Telegram/SourceFiles/boxes/peers/edit_peer_type_box.h
@@ -10,6 +10,8 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "boxes/abstract_box.h"
 #include "base/timer.h"
 
+enum LangKey : int;
+
 namespace style {
 struct InfoProfileCountButton;
 } // namespace style
@@ -43,7 +45,8 @@ public:
 		not_null<PeerData*> p,
 		FnMut<void(Privacy, QString)> savedCallback,
 		std::optional<Privacy> privacySaved = std::nullopt,
-		std::optional<QString> usernameSaved = std::nullopt);
+		std::optional<QString> usernameSaved = std::nullopt,
+		std::optional<LangKey> usernameError = std::nullopt);
 
 protected:
 	void prepare() override;
@@ -56,6 +59,7 @@ private:
 
 	std::optional<Privacy> _privacySavedValue = std::nullopt;
 	std::optional<QString> _usernameSavedValue = std::nullopt;
+	std::optional<LangKey> _usernameError = std::nullopt;
 
 	rpl::event_stream<> _focusRequests;