Make pool clear

Hi! I have known DHCP issue with Windows 7, where addressies are “busy”, it is not problem and can resolved with script. But now I have problem in pool. I think picture will say all )
the name of pool unknown is because i tried to remove pool, and make new one.
MT.png

A reboot should resolve this issue

Yes, reboot solve problem. But I think it’s not normal. It’s a bug for Mikrotik team )