[Bitrix\Main\DB\SqlQueryException] 
Mysql query error: (1036) Table 'b_cache_tag' is read only (400)

				INSERT IGNORE INTO b_cache_tag (SITE_ID, CACHE_SALT, RELATIVE_PATH, TAG)
				VALUES
			('s1', '/a51', '/s1/MyIblock/_getAll', 'iblocks')
/var/www/html/bitrix/modules/main/lib/db/mysqliconnection.php:137
#0: Bitrix\Main\DB\MysqliConnection->queryInternal(string, array, NULL)
	/var/www/html/bitrix/modules/main/lib/db/connection.php:330
#1: Bitrix\Main\DB\Connection->query(string, NULL)
	/var/www/html/bitrix/modules/main/lib/db/connection.php:379
#2: Bitrix\Main\DB\Connection->queryExecute(string)
	/var/www/html/bitrix/modules/main/lib/data/taggedcache.php:120
#3: Bitrix\Main\Data\TaggedCache->endTagCache()
	/var/www/html/bitrix/modules/main/classes/general/cache.php:463
#4: CCacheManager->EndTagCache()
	/var/www/html/local/php_interface/_classes/MyCache.php:53
#5: MyCache->get(object)
	/var/www/html/local/php_interface/_classes/MyIblock.php:32
#6: MyIblock::_getAll()
	/var/www/html/local/php_interface/_classes/MyIblock.php:48
#7: MyIblock::get(string)
	/var/www/html/local/php_interface/_classes/Bostro/City.php:13
#8: Bostro_City::{closure}(object)
	/var/www/html/local/php_interface/_classes/MyCache.php:51
#9: MyCache->get(object)
	/var/www/html/local/php_interface/_classes/Bostro/City.php:78
#10: Bostro_City::_getAll()
	/var/www/html/local/php_interface/_classes/Bostro/City.php:139
#11: Bostro_City::get()
	/var/www/html/local/php_interface/_classes/MyBitrix.php:54
#12: MyBitrix::onPageStart()
	/var/www/html/bitrix/modules/main/classes/general/module.php:475
#13: ExecuteModuleEventEx(array)
	/var/www/html/bitrix/modules/main/include.php:291
#14: require_once(string)
	/var/www/html/bitrix/modules/main/include/prolog_before.php:14
#15: require_once(string)
	/var/www/html/bitrix/modules/main/include/prolog.php:10
#16: require_once(string)
	/var/www/html/bitrix/header.php:1
#17: require(string)
	/var/www/html/catalog/index.php:2
#18: include_once(string)
	/var/www/html/bitrix/modules/main/include/urlrewrite.php:159
#19: include_once(string)
	/var/www/html/bitrix/urlrewrite.php:2