Fatal error: Cannot redeclare plugin_add_settings_link()

Got the following error after installing the Clickback plugin and trying to activate it.

Fatal error: Cannot redeclare plugin_add_settings_link() (previously declared in /home1/fzquggmy/public_html/wp-content/plugins/wp-gotowebinar/wp-gotowebinar.php:62) in /home1/fzquggmy/public_html/wp-content/plugins/clickback-web-tracker/clickbackWEB.php on line 26