Synhronize old session and new session

[vitalypanait]

Hi. How can I synhronize old session with new session? I got an error (Could not extract type: Photo with id 9c477dd8) in old session and now my app doesn't work at all.

[vitalypanait]

danog\MadelineProto\TL\Exception [ 0 ] Could not extract type: Photo with id 9c477dd8 in /var/sites//shared/vendor/danog/madelineproto/src/danog/MadelineProto/TL/TL.php#L581
URI: /api/channel?channel_id=channel%231404536196&sig=
#0 /var/sites//shared/vendor/danog/madelineproto/src/danog/MadelineProto/TL/TL.php(641): danog\MadelineProto\MTProto->deserialize(Resource id #38, Array)
#1 /var/sites//shared/vendor/danog/madelineproto/src/danog/MadelineProto/TL/TL.php(641): danog\MadelineProto\MTProto->deserialize(Resource id #38, Array)
#2 /var/sites//shared/vendor/danog/madelineproto/src/danog/MadelineProto/TL/TL.php(641): danog\MadelineProto\MTProto->deserialize(Resource id #38, Array)
#3 /var/sites//shared/vendor/danog/madelineproto/src/danog/MadelineProto/TL/TL.php(562): danog\MadelineProto\MTProto->deserialize(Resource id #38, Array)
#4 /var/sites//shared/vendor/danog/madelineproto/src/danog/MadelineProto/TL/TL.php(641): danog\MadelineProto\MTProto->deserialize(Resource id #38, Array)
#5 /var/sites//shared/vendor/danog/madelineproto/src/danog/MadelineProto/TL/TL.php(592): danog\MadelineProto\MTProto->deserialize(Resource id #38, Array)
#6 /var/sites//shared/vendor/danog/madelineproto/src/danog/MadelineProto/TL/TL.php(641): danog\MadelineProto\MTProto->deserialize(Resource id #37, Array)
#7 /var/sites//shared/vendor/danog/madelineproto/src/danog/MadelineProto/MTProtoTools/MessageHandler.php(135): danog\MadelineProto\MTProto->deserialize(Resource id #37, Array)
#8 /var/sites//shared/vendor/danog/madelineproto/src/danog/MadelineProto/MTProtoTools/CallHandler.php(152): danog\MadelineProto\MTProto->recv_message(2)
#9 /var/sites//shared/vendor/danog/madelineproto/src/danog/MadelineProto/MTProtoTools/UpdateHandler.php(300): danog\MadelineProto\MTProto->method_call('updates.getDiff...', Array, Array)
#10 /var/sites//shared/vendor/danog/madelineproto/src/danog/MadelineProto/MTProto.php(283): danog\MadelineProto\MTProto->get_updates_difference()
#11 [internal function]: danog\MadelineProto\MTProto->__wakeup()
#12 /var/sites//shared/vendor/danog/madelineproto/src/danog/MadelineProto/API.php(52): unserialize('O:23:"danog\Mad...')
#13 /var/sites/**/shared/vendor/danog/magicalserializer/src/danog/Serializable.php(35): danog\MadelineProto\API->__magic_construct('/var/sites/...')
#14 https://github.com/viboomru/******/blob/master/app/models/MadelineProto.php#L106: danog\MadelineProto\API->__construct('/var/sites/...')

[danog]

What do you mean by synchronize old session with new session?