diff --git a/td/telegram/ContactsManager.cpp b/td/telegram/ContactsManager.cpp
index ea7cd21d4..d8526b048 100644
--- a/td/telegram/ContactsManager.cpp
+++ b/td/telegram/ContactsManager.cpp
@@ -48,7 +48,6 @@
 #include "td/telegram/PremiumGiftOption.hpp"
 #include "td/telegram/ReactionManager.h"
 #include "td/telegram/SecretChatLayer.h"
-#include "td/telegram/SecretChatsManager.h"
 #include "td/telegram/ServerMessageId.h"
 #include "td/telegram/StickerPhotoSize.h"
 #include "td/telegram/StickersManager.h"
@@ -8966,27 +8965,6 @@ void ContactsManager::delete_channel(ChannelId channel_id, Promise<Unit> &&promi
   td_->create_handler<DeleteChannelQuery>(std::move(promise))->send(channel_id);
 }
 
-void ContactsManager::delete_dialog(DialogId dialog_id, Promise<Unit> &&promise) {
-  if (!td_->dialog_manager_->have_dialog_force(dialog_id, "delete_dialog")) {
-    return promise.set_error(Status::Error(400, "Chat not found"));
-  }
-
-  switch (dialog_id.get_type()) {
-    case DialogType::User:
-      return td_->messages_manager_->delete_dialog_history(dialog_id, true, true, std::move(promise));
-    case DialogType::Chat:
-      return delete_chat(dialog_id.get_chat_id(), std::move(promise));
-    case DialogType::Channel:
-      return delete_channel(dialog_id.get_channel_id(), std::move(promise));
-    case DialogType::SecretChat:
-      send_closure(td_->secret_chats_manager_, &SecretChatsManager::cancel_chat, dialog_id.get_secret_chat_id(), true,
-                   std::move(promise));
-      return;
-    default:
-      UNREACHABLE();
-  }
-}
-
 void ContactsManager::send_update_add_chat_members_privacy_forbidden(DialogId dialog_id, vector<UserId> user_ids,
                                                                      const char *source) {
   td_->dialog_manager_->force_create_dialog(dialog_id, "send_update_add_chat_members_privacy_forbidden");
diff --git a/td/telegram/ContactsManager.h b/td/telegram/ContactsManager.h
index d6d83f6e7..29ee4685f 100644
--- a/td/telegram/ContactsManager.h
+++ b/td/telegram/ContactsManager.h
@@ -521,7 +521,9 @@ class ContactsManager final : public Actor {
 
   void report_channel_anti_spam_false_positive(ChannelId channel_id, MessageId message_id, Promise<Unit> &&promise);
 
-  void delete_dialog(DialogId dialog_id, Promise<Unit> &&promise);
+  void delete_chat(ChatId chat_id, Promise<Unit> &&promise);
+
+  void delete_channel(ChannelId channel_id, Promise<Unit> &&promise);
 
   void send_update_add_chat_members_privacy_forbidden(DialogId dialog_id, vector<UserId> user_ids, const char *source);
 
@@ -1987,10 +1989,6 @@ class ContactsManager final : public Actor {
                                   tl_object_ptr<telegram_api::InputCheckPasswordSRP> input_check_password,
                                   Promise<Unit> &&promise);
 
-  void delete_chat(ChatId chat_id, Promise<Unit> &&promise);
-
-  void delete_channel(ChannelId channel_id, Promise<Unit> &&promise);
-
   void get_channel_statistics_dc_id_impl(ChannelId channel_id, bool for_full_statistics, Promise<DcId> &&promise);
 
   void on_get_support_user(UserId user_id, Promise<td_api::object_ptr<td_api::user>> &&promise);
diff --git a/td/telegram/DialogManager.cpp b/td/telegram/DialogManager.cpp
index becd8d132..ff7204912 100644
--- a/td/telegram/DialogManager.cpp
+++ b/td/telegram/DialogManager.cpp
@@ -19,6 +19,7 @@
 #include "td/telegram/misc.h"
 #include "td/telegram/ReportReason.h"
 #include "td/telegram/SecretChatId.h"
+#include "td/telegram/SecretChatsManager.h"
 #include "td/telegram/StickerPhotoSize.h"
 #include "td/telegram/Td.h"
 #include "td/telegram/UpdatesManager.h"
@@ -849,6 +850,27 @@ bool DialogManager::on_get_dialog_error(DialogId dialog_id, const Status &status
   return false;
 }
 
+void DialogManager::delete_dialog(DialogId dialog_id, Promise<Unit> &&promise) {
+  if (!have_dialog_force(dialog_id, "delete_dialog")) {
+    return promise.set_error(Status::Error(400, "Chat not found"));
+  }
+
+  switch (dialog_id.get_type()) {
+    case DialogType::User:
+      return td_->messages_manager_->delete_dialog_history(dialog_id, true, true, std::move(promise));
+    case DialogType::Chat:
+      return td_->contacts_manager_->delete_chat(dialog_id.get_chat_id(), std::move(promise));
+    case DialogType::Channel:
+      return td_->contacts_manager_->delete_channel(dialog_id.get_channel_id(), std::move(promise));
+    case DialogType::SecretChat:
+      send_closure(td_->secret_chats_manager_, &SecretChatsManager::cancel_chat, dialog_id.get_secret_chat_id(), true,
+                   std::move(promise));
+      return;
+    default:
+      UNREACHABLE();
+  }
+}
+
 string DialogManager::get_dialog_title(DialogId dialog_id) const {
   switch (dialog_id.get_type()) {
     case DialogType::User:
diff --git a/td/telegram/DialogManager.h b/td/telegram/DialogManager.h
index 8f4599a9d..a0a9246c1 100644
--- a/td/telegram/DialogManager.h
+++ b/td/telegram/DialogManager.h
@@ -111,6 +111,8 @@ class DialogManager final : public Actor {
 
   bool on_get_dialog_error(DialogId dialog_id, const Status &status, const char *source);
 
+  void delete_dialog(DialogId dialog_id, Promise<Unit> &&promise);
+
   string get_dialog_title(DialogId dialog_id) const;
 
   const DialogPhoto *get_dialog_photo(DialogId dialog_id) const;
diff --git a/td/telegram/MessagesManager.cpp b/td/telegram/MessagesManager.cpp
index 8cdccb3a5..01a1c1b17 100644
--- a/td/telegram/MessagesManager.cpp
+++ b/td/telegram/MessagesManager.cpp
@@ -18131,9 +18131,6 @@ DialogId MessagesManager::create_new_group_chat(const vector<UserId> &user_ids,
 
     created_dialogs_.erase(it);
 
-    // set default notification settings to newly created chat
-    on_update_dialog_notify_settings(dialog_id, nullptr, "create_new_group_chat");
-
     promise.set_value(Unit());
     return dialog_id;
   }
@@ -18181,9 +18178,6 @@ DialogId MessagesManager::create_new_channel_chat(const string &title, bool is_f
 
     created_dialogs_.erase(it);
 
-    // set default notification settings to newly created chat
-    on_update_dialog_notify_settings(dialog_id, nullptr, "create_new_channel_chat");
-
     promise.set_value(Unit());
     return dialog_id;
   }
diff --git a/td/telegram/Td.cpp b/td/telegram/Td.cpp
index 113af3585..cabbe3d3e 100644
--- a/td/telegram/Td.cpp
+++ b/td/telegram/Td.cpp
@@ -5374,7 +5374,7 @@ void Td::on_request(uint64 id, const td_api::deleteChat &request) {
       send_closure(actor_id, &MessagesManager::on_dialog_deleted, dialog_id, std::move(promise));
     }
   };
-  contacts_manager_->delete_dialog(dialog_id, std::move(query_promise));
+  dialog_manager_->delete_dialog(dialog_id, std::move(query_promise));
 }
 
 void Td::on_request(uint64 id, const td_api::getMessageThreadHistory &request) {
@@ -6037,7 +6037,7 @@ void Td::on_request(uint64 id, const td_api::createSupergroupChat &request) {
   CREATE_REQUEST(CreateChatRequest, DialogId(ChannelId(request.supergroup_id_)), request.force_);
 }
 
-void Td::on_request(uint64 id, td_api::createSecretChat &request) {
+void Td::on_request(uint64 id, const td_api::createSecretChat &request) {
   CREATE_REQUEST(CreateChatRequest, DialogId(SecretChatId(request.secret_chat_id_)), true);
 }
 
@@ -6057,7 +6057,7 @@ void Td::on_request(uint64 id, td_api::createNewSupergroupChat &request) {
                  request.message_auto_delete_time_);
 }
 
-void Td::on_request(uint64 id, td_api::createNewSecretChat &request) {
+void Td::on_request(uint64 id, const td_api::createNewSecretChat &request) {
   CREATE_REQUEST(CreateNewSecretChatRequest, request.user_id_);
 }
 
diff --git a/td/telegram/Td.h b/td/telegram/Td.h
index 3968ccf9f..c354f246f 100644
--- a/td/telegram/Td.h
+++ b/td/telegram/Td.h
@@ -896,13 +896,13 @@ class Td final : public Actor {
 
   void on_request(uint64 id, const td_api::createSupergroupChat &request);
 
-  void on_request(uint64 id, td_api::createSecretChat &request);
+  void on_request(uint64 id, const td_api::createSecretChat &request);
 
   void on_request(uint64 id, td_api::createNewBasicGroupChat &request);
 
   void on_request(uint64 id, td_api::createNewSupergroupChat &request);
 
-  void on_request(uint64 id, td_api::createNewSecretChat &request);
+  void on_request(uint64 id, const td_api::createNewSecretChat &request);
 
   void on_request(uint64 id, const td_api::createCall &request);