[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (2006) MySQL server has gone away (400)
DELETE FROM `b_sec_session` WHERE `SESSION_ID` = 'sj237pe2f3gefigm799ihh0lp8'
/home/bitrix/ext_www/smoservice.media/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/home/bitrix/ext_www/smoservice.media/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string, NULL)
	/home/bitrix/ext_www/smoservice.media/bitrix/modules/main/lib/db/connection.php:379
#2: Bitrix\Main\DB\Connection->queryExecute(string)
	/home/bitrix/ext_www/smoservice.media/bitrix/modules/main/lib/orm/data/datamanager.php:1624
#3: Bitrix\Main\ORM\Data\DataManager::delete(array)
	/home/bitrix/ext_www/smoservice.media/bitrix/modules/security/classes/general/session_db.php:100
#4: CSecuritySessionDB::write(string, string)
	/home/bitrix/ext_www/smoservice.media/bitrix/modules/security/classes/general/session_handler.php:28
#5: CSecuritySessionHandler->write(string, string)
	
#6: session_regenerate_id()
	/home/bitrix/ext_www/smoservice.media/bitrix/modules/security/classes/general/session.php:55
#7: CSecuritySession::UpdateSessID()
	/home/bitrix/ext_www/smoservice.media/bitrix/modules/main/classes/general/module.php:465
#8: ExecuteModuleEventEx(array)
	/home/bitrix/ext_www/smoservice.media/bitrix/modules/main/include.php:303
#9: require_once(string)
	/home/bitrix/ext_www/smoservice.media/bitrix/modules/main/include/prolog_before.php:14
#10: require_once(string)
	/home/bitrix/ext_www/smoservice.media/bitrix/modules/main/include/prolog.php:10
#11: require_once(string)
	/home/bitrix/ext_www/smoservice.media/bitrix/header.php:1
#12: require(string)
	/home/bitrix/ext_www/smoservice.media/index.php:5
#13: include_once(string)
	/home/bitrix/ext_www/smoservice.media/bitrix/modules/main/include/urlrewrite.php:159
#14: include_once(string)
	/home/bitrix/ext_www/smoservice.media/bitrix/urlrewrite.php:2