To manually run a backup of all your settings and servers in wato, from the command line run,
check_mk -v –backup backup-1.tar.gz this backs up all of the info on old server
Then copy the file to the new server and on the new server run,
check_mk –restore backup-1.tar.gz
Once run check the check the permissions of the wato folder on /etc/check_mk/conf.d and make certain the nagios user has the same permissions after the restore on the new server.