public function is_valid_field() {
		global $wpdb;

		$bp = buddypress();

		$retval = $wpdb->get_row( $wpdb->prepare( "SELECT id FROM {$bp->profile->table_name_fields} WHERE id = %d", $this->field_id ) );

		/**
		 * Filters whether or not data is for a valid field.
		 *
		 * @since 1.2.7
		 *
		 * @param bool                    $retval Whether or not data is valid.
		 * @param BP_XProfile_ProfileData $this   Instance of the current BP_XProfile_ProfileData class.
		 */
		return apply_filters_ref_array( 'xprofile_data_is_valid_field', array( (bool)$retval, $this ) );
	}