Local DNS not reliable

/var/ipfire/main/hosts
on,192.168.20.47,huaweimbWifi,pscar.dynu.com,on
on,192.168.20.49,huaweimb,pscar.dynu.com,on
/var/ipfire/dhcp/fixleases
9c:29:76:21:45:94,192.168.20.47,on,,,,huaweimbWifi
00:e0:4c:68:01:fc,192.168.20.49,on,,,,huaweimb

matebook is the name of my PC Windows 11

in this case I have the situation described above in the DNS