Duplicate entry '1708' for key 'PRIMARY'
/homepages/10/d525861202/htdocs/public_html/wvpwu/system/Application/Application.php::1835
REPLACE INTO `core_tasks` ( `app`, `key`, `frequency`, `next_run` )
Listed is the error that pops up during the upgrade process. Tried clearing cache and starting the upgrade again with no success.