The latest update went wrong. My site is now in an unstable condition. Any suggestions?

An Unexpected Error occurred while upgrading: #0 /home/vhosts/helpzegroeien.nl/httpdocs/updates/concrete5.6.2.1_updater/concrete/libraries/3rdparty/adodb/adodb.inc.php(1074): adodb_throw('mysqlt', 'EXECUTE', 1064, 'You have an err...', 'SELECT TABLE_NA...', false, Object(ADODB_mysqlt)) #1 /home/vhosts/helpzegroeien.nl/httpdocs/updates/concrete5.6.2.1_updater/concrete/libraries/3rdparty/adodb/adodb.inc.php(1049): ADOConnection->_Execute('SELECT TABLE_NA...', false) #2 /home/vhosts/helpzegroeien.nl/httpdocs/updates/concrete5.6.2.1_updater/concrete/libraries/3rdparty/adodb/adodb.inc.php(2334): ADOConnection->Execute('SELECT TABLE_NA...') #3 /home/vhosts/helpzegroeien.nl/httpdocs/updates/concrete5.6.2.1_updater/concrete/libraries/3rdparty/adodb/drivers/adodb-mysql.inc.php(150): ADOConnection->MetaTables(false, false) #4 /home/vhosts/helpzegroeien.nl/httpdocs/updates/concrete5.6.2.1_updater/concrete/core/libraries/cache.php(166): ADODB_mysql->MetaTables() #5 /home/vhosts/helpzegroeien.nl/httpdocs/updates/concrete5.6.2.1_updater/concrete/core/controllers/single_pages/upgrade.php(238): Concrete5_Library_Cache->flush() #6 /home/vhosts/helpzegroeien.nl/httpdocs/updates/concrete5.6.2.1_updater/concrete/core/controllers/single_pages/upgrade.php(44): Concrete5_Controller_Upgrade->do_upgrade() #7 [internal function]: Concrete5_Controller_Upgrade->view('tools', 'required', 'upgrade') #8 /home/vhosts/helpzegroeien.nl/httpdocs/updates/concrete5.6.2.1_updater/concrete/core/libraries/controller.php(264): call_user_func_array(Array, Array) #9 /home/vhosts/helpzegroeien.nl/httpdocs/updates/concrete5.6.2.1_updater/concrete/core/libraries/controller.php(234): Concrete5_Library_Controller->runTask('view', Array) #10 /home/vhosts/helpzegroeien.nl/httpdocs/updates/concrete5.6.2.1_updater/concrete/core/libraries/view.php(783): Concrete5_Library_Controller->setupAndRun() #11 /home/vhosts/helpzegroeien.nl/httpdocs/updates/concrete5.6.2.1_updater/concrete/tools/upgrade.php(6): Concrete5_Library_View->render('/upgrade') #12 /home/vhosts/helpzegroeien.nl/httpdocs/updates/concrete5.6.2.1_updater/concrete/startup/tools_upgrade_check.php(9): include('/home/vhosts/he...') #13 /home/vhosts/helpzegroeien.nl/httpdocs/updates/concrete5.6.2.1_updater/concrete/dispatcher.php(105): require('/home/vhosts/he...') #14 /home/vhosts/helpzegroeien.nl/httpdocs/concrete/startup/updated_core_check.php(6): require('/home/vhosts/he...') #15 /home/vhosts/helpzegroeien.nl/httpdocs/concrete/dispatcher.php(14): require('/home/vhosts/he...') #16 /home/vhosts/helpzegroeien.nl/httpdocs/index.php(2): require('/home/vhosts/he...') #17 {main}