diff --git a/src/danog/MadelineProto/Logger.php b/src/danog/MadelineProto/Logger.php
index e436e326..6b113676 100644
--- a/src/danog/MadelineProto/Logger.php
+++ b/src/danog/MadelineProto/Logger.php
@@ -92,7 +92,7 @@ class Logger
     /**
      * Log rotation loop ID.
      */
-    private string $rotateId;
+    private string $rotateId = '';
     const ULTRA_VERBOSE = 5;
     const VERBOSE = 4;
     const NOTICE = 3;
@@ -245,7 +245,7 @@ class Logger
     /**
      * Destructor function.
      */
-    public function __destruct(): void
+    public function __destruct()
     {
         if ($this->rotateId) {
             Loop::cancel($this->rotateId);
diff --git a/src/danog/MadelineProto/Loop/Connection/WriteLoop.php b/src/danog/MadelineProto/Loop/Connection/WriteLoop.php
index b34352ae..d89604eb 100644
--- a/src/danog/MadelineProto/Loop/Connection/WriteLoop.php
+++ b/src/danog/MadelineProto/Loop/Connection/WriteLoop.php
@@ -275,7 +275,7 @@ class WriteLoop extends ResumableSignalLoop
 
             $acks = \array_slice($connection->ack_queue, 0, self::MAX_COUNT);
             if ($ackCount = \count($acks)) {
-                $API->logger->logger("Adding msgs_ack", Logger::ERROR);
+                $API->logger->logger("Adding msgs_ack", Logger::ULTRA_VERBOSE);
 
                 $body = yield from $this->API->getTL()->serializeObject(['type' => ''], ['_' => 'msgs_ack', 'msg_ids' => $acks], 'msgs_ack');
                 $messages []= [
diff --git a/src/danog/MadelineProto/MTProto.php b/src/danog/MadelineProto/MTProto.php
index de624968..ac39cf38 100644
--- a/src/danog/MadelineProto/MTProto.php
+++ b/src/danog/MadelineProto/MTProto.php
@@ -570,9 +570,6 @@ class MTProto extends AsyncConstruct implements TLCallback
 
             // Report URI
             'reportDest',
-
-            // Packagist install report state
-            'packagistReported'
         ];
     }
 
diff --git a/src/danog/MadelineProto/Serialization.php b/src/danog/MadelineProto/Serialization.php
index 912eac53..e5b2280e 100644
--- a/src/danog/MadelineProto/Serialization.php
+++ b/src/danog/MadelineProto/Serialization.php
@@ -19,6 +19,8 @@
 
 namespace danog\MadelineProto;
 
+use Amp\Loop;
+
 use function Amp\File\exists;
 use function Amp\File\get;
 
@@ -43,7 +45,7 @@ class Serialization
     public static function realpaths(string $file): array
     {
         $file = Tools::absolute($file);
-        return ['file' => $file, 'lockfile' => $file.'.lock', 'tempfile' => $file.'.temp.session'];
+        return ['file' => $file, 'lockfile' => $file.'.lock', 'tempfile' => $file.'.temp.session', 'session_lockfile' => $file.'.slock', ];
     }
     /**
      * Unserialize legacy session.
@@ -58,6 +60,23 @@ class Serialization
     {
         $realpaths = self::realpaths($session);
         if (yield exists($realpaths['file'])) {
+            Logger::log('Waiting for exclusive session lock...');
+            $warningId = Loop::delay(1000, static function () use (&$warningId) {
+                Logger::log("It seems like the session is busy.");
+                Logger::log("Telegram does not support starting multiple instances of the same session, make sure no other instance of the session is running.");
+                $warningId = Loop::repeat(5000, fn () => Logger::log('Still waiting for exclusive session lock...'));
+                Loop::unreference($warningId);
+            });
+            Loop::unreference($warningId);
+            $unlock = yield Tools::flock($realpaths['session_lockfile'], LOCK_EX, 1);
+            Loop::cancel($warningId);
+            Shutdown::addCallback(static function () use ($unlock) {
+                Logger::log("Unlocking exclusive session lock!");
+                $unlock();
+                Logger::log("Unlocked exclusive session lock!");
+            });
+            Logger::log("Got exclusive session lock!");
+
             Logger::log('Waiting for shared lock of serialization lockfile...');
             $unlock = yield Tools::flock($realpaths['lockfile'], LOCK_SH);
             Logger::log('Shared lock acquired, deserializing...');
diff --git a/src/danog/MadelineProto/Wrappers/Loop.php b/src/danog/MadelineProto/Wrappers/Loop.php
index fe0bf868..84c375d2 100644
--- a/src/danog/MadelineProto/Wrappers/Loop.php
+++ b/src/danog/MadelineProto/Wrappers/Loop.php
@@ -76,44 +76,6 @@ trait Loop
                 $this->logger->logger("Self-restarted, restart token ".$_REQUEST['MadelineSelfRestart']);
             }
             $this->logger->logger($needs_restart ? 'Will self-restart' : 'Will not self-restart');
-            $backtrace = \debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
-            $lockfile = \dirname(\end($backtrace)['file']).'/bot'.$this->authorization['user']['id'].'.lock';
-            unset($backtrace);
-            $try_locking = true;
-            if (!\file_exists($lockfile)) {
-                \touch($lockfile);
-                $lock = \fopen($lockfile, 'r+');
-            } elseif (isset($GLOBALS['lock'])) {
-                $try_locking = false;
-                $lock = $GLOBALS['lock'];
-            } else {
-                $lock = \fopen($lockfile, 'r+');
-            }
-            if ($try_locking) {
-                $this->logger->logger('Will try locking');
-                $try = 1;
-                $locked = false;
-                while (!$locked) {
-                    $locked = \flock($lock, LOCK_EX | LOCK_NB);
-                    if (!$locked) {
-                        $this->closeConnection('Bot is already running');
-                        if ($try++ >= 30) {
-                            exit;
-                        }
-                        \sleep(1);
-                    }
-                }
-                $this->logger->logger('Locked!');
-            }
-            $this->logger->logger("Adding unlock callback!");
-            $logger =& $this->logger;
-            $id = Shutdown::addCallback(static function () use ($lock, $logger) {
-                $logger->logger("Unlocking lock!");
-                \flock($lock, LOCK_UN);
-                \fclose($lock);
-                $logger->logger("Unlocked lock!");
-            });
-            $this->logger->logger("Added unlock callback with id $id!");
             if ($needs_restart) {
                 $this->logger->logger("Adding restart callback!");
                 $id = Shutdown::addCallback(static function () use (&$logger) {