Database errors when wp optimize activated

When I activate wp optimize, I get this error in my phperrors file:

[04-May-2020 16:33:58 UTC] WordPress database error Duplicate column name ‘last_locked_at’ for query ALTER TABLE wp_tm_tasks ADD last_locked_at BIGINT DEFAULT 0 AFTER time_created made by require(‘wp-blog-header.php’), require_once(‘wp-load.php’), require_once(‘wp-config.php’), require_once(‘wp-settings.php’), do_action(‘plugins_loaded’), WP_Hook->do_action, WP_Hook->apply_filters, WP_Optimize->plugins_loaded, WP_Optimize->get_task_manager, Updraft_Tasks_Activation::check_updates, Updraft_Tasks_Activation::add_lock_column