bp_messages_admin_repair_unread_messages_count()

function bp_messages_admin_repair_unread_messages_count() {
	global $wpdb;

	$offset           = isset( $_POST['offset'] ) ? (int) ( $_POST['offset'] ) : 0;
	$bp               = buddypress();
	$recipients_query = "SELECT DISTINCT thread_id FROM {$bp->messages->table_name_recipients} LIMIT 50 OFFSET $offset ";
	$recipients       = $wpdb->get_results( $recipients_query );

	if ( ! empty( $recipients ) ) {
		foreach ( $recipients as $recipient ) {
			$thread_id = (int) $recipient->thread_id;
			if ( ! empty( $thread_id ) ) {
				$is_valid = messages_is_valid_thread( $thread_id );
				if ( empty( $is_valid ) ) {
					messages_delete_thread( $thread_id, bp_loggedin_user_id() );
				}
			}
			$offset ++;
		}
		$records_updated = sprintf( __( '%s thread updated successfully.', 'buddyboss' ), number_format_i18n( $offset ) );

		return array(
			'status'  => 'running',
			'offset'  => $offset,
			'records' => $records_updated,
		);
	} else {
		return array(
			'status'  => 1,
			'message' => __( 'thread update complete!', 'buddyboss' ),
		);
	}
}