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@@ -4589,7 +4589,7 @@ class CourseManager
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* @param int $url_id
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*
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*/
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- public function remove_course_ranking($course_id, $session_id, $url_id = null)
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+ public static function remove_course_ranking($course_id, $session_id, $url_id = null)
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{
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$table_course_ranking = Database::get_main_table(TABLE_STATISTIC_TRACK_COURSE_RANKING);
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$table_user_course_vote = Database::get_main_table(TABLE_MAIN_USER_REL_COURSE_VOTE);
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