public function save_course_settings( $post_id ) {

		// Return early on quick edits.
		$action = llms_filter_input( INPUT_POST, 'action' );
		if ( 'inline-save' === $action ) {
			return null;
		}

		$ids = array();

		if ( isset( $_POST['_llms_bbp_forum_ids'] ) ) {  // phpcs:ignore WordPress.Security.NonceVerification.Missing

			$ids = llms_filter_input( INPUT_POST, '_llms_bbp_forum_ids', FILTER_SANITIZE_NUMBER_INT, FILTER_REQUIRE_ARRAY );
		}

		update_post_meta( $post_id, '_llms_bbp_forum_ids', $ids );

		return $ids;

	}