Magento – Error report in var/report ,what does it mean? and is it serious problem? It keep create those error report and take 1.7 GB space already

Can anyone suggest me how to fix the following error file? It create a lot those error file in var/report.

Am I right that I can simply delete all those error file in Var/report?

a:4:{i:0;s:106:"SQLSTATE[42000] [1203] User advancea_mage2 already has
more than 'max_user_connections' active connections";i:1;s:3566:"#0
/home/advancea/domains/advanceauto.co.th/public_html/lib/Zend/Db/Adapter/Pdo/Mysql.php(109):
Zend_Db_Adapter_Pdo_Abstract->_connect() #1
/home/advancea/domains/advanceauto.co.th/public_html/lib/Varien/Db/Adapter/Pdo/Mysql.php(320):
Zend_Db_Adapter_Pdo_Mysql->_connect() #2
/home/advancea/domains/advanceauto.co.th/public_html/lib/Zend/Db/Adapter/Abstract.php(460):
Varien_Db_Adapter_Pdo_Mysql->_connect() #3
/home/advancea/domains/advanceauto.co.th/public_html/lib/Zend/Db/Adapter/Pdo/Abstract.php(238):
Zend_Db_Adapter_Abstract->query('SET NAMES utf8', Array) #4
/home/advancea/domains/advanceauto.co.th/public_html/lib/Varien/Db/Adapter/Pdo/Mysql.php(428):
Zend_Db_Adapter_Pdo_Abstract->query('SET NAMES utf8', Array) #5
/home/advancea/domains/advanceauto.co.th/public_html/app/code/core/Mage/Core/Model/Resource.php(169):
Varien_Db_Adapter_Pdo_Mysql->query('SET NAMES utf8') #6
/home/advancea/domains/advanceauto.co.th/public_html/app/code/core/Mage/Core/Model/Resource.php(110):
Mage_Core_Model_Resource->_newConnection('pdo_mysql',
Object(Mage_Core_Model_Config_Element)) #7
/home/advancea/domains/advanceauto.co.th/public_html/app/code/core/Mage/Core/Model/Resource/Db/Abstract.php(320):
Mage_Core_Model_Resource->getConnection('core_write') #8
/home/advancea/domains/advanceauto.co.th/public_html/app/code/core/Mage/Core/Model/Resource/Db/Abstract.php(350):
Mage_Core_Model_Resource_Db_Abstract->_getConnection('write') #9
/home/advancea/domains/advanceauto.co.th/public_html/app/code/core/Mage/Core/Model/Resource/Db/Abstract.php(335):
Mage_Core_Model_Resource_Db_Abstract->_getWriteAdapter() #10
/home/advancea/domains/advanceauto.co.th/public_html/app/code/core/Mage/Core/Model/Resource/Db/Abstract.php(360):
Mage_Core_Model_Resource_Db_Abstract->_getReadAdapter() #11
/home/advancea/domains/advanceauto.co.th/public_html/app/code/core/Mage/Core/Model/Resource/Db/Collection/Abstract.php(134):
Mage_Core_Model_Resource_Db_Abstract->getReadConnection() #12
/home/advancea/domains/advanceauto.co.th/public_html/app/code/core/Mage/Core/Model/Config.php(1348):
Mage_Core_Model_Resource_Db_Collection_Abstract->__construct(Object(Mage_Core_Model_Resource_Website))
13 /home/advancea/domains/advanceauto.co.th/public_html/app/code/core/Mage/Core/Model/Config.php(1380):
Mage_Core_Model_Config->getModelInstance('core_resource/w…',
Object(Mage_Core_Model_Resource_Website)) #14
/home/advancea/domains/advanceauto.co.th/public_html/app/Mage.php(491):
Mage_Core_Model_Config->getResourceModelInstance('core/website_co…',
Object(Mage_Core_Model_Resource_Website)) #15
/home/advancea/domains/advanceauto.co.th/public_html/app/code/core/Mage/Core/Model/Abstract.php(208):
Mage::getResourceModel('core/website_co…',
Object(Mage_Core_Model_Resource_Website)) #16
/home/advancea/domains/advanceauto.co.th/public_html/app/code/core/Mage/Core/Model/Abstract.php(213):
Mage_Core_Model_Abstract->getResourceCollection() #17
/home/advancea/domains/advanceauto.co.th/public_html/app/code/core/Mage/Core/Model/App.php(608):
Mage_Core_Model_Abstract->getCollection() #18
/home/advancea/domains/advanceauto.co.th/public_html/app/code/core/Mage/Core/Model/App.php(466):
Mage_Core_Model_App->_initStores() #19
/home/advancea/domains/advanceauto.co.th/public_html/app/code/core/Mage/Core/Model/App.php(349):
Mage_Core_Model_App->_initCurrentStore('', 'store') #20
/home/advancea/domains/advanceauto.co.th/public_html/app/Mage.php(684):
Mage_Core_Model_App->run(Array) #21
/home/advancea/domains/advanceauto.co.th/public_html/index.php(87):
Mage::run('', 'store') #22
{main}";s:3:"url";s:795:"/our-products.html?amp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bp=2&amp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bbrand=5&amp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bcat=3&amp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bmode=list&amp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bbrand=19&amp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bbrand=18&amp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bbrand=4&amp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bbrand=18&amp%3Bamp%3Bamp%3Bamp%3Bamp%3Bamp%3Bbrand=19&amp%3Bamp%3Bamp%3Bamp%3Bamp%3Bbrand=8&amp%3Bamp%3Bamp%3Bamp%3Bcar_type=16&amp%3Bamp%3Bamp%3Bp=5&amp%3Bamp%3Bbrand=17&amp%3Bcar_type=16&p=4";s:11:"script_name";s:10:"/index.php";}