cannot delete static route on mac

On my MAC, a strange route appears every time I connect to a Wi-Fi network.

this is the routing table:

Internet: Destination Gateway Flags Refs Use Netif Expire default 192.168.1.1 UGSc 111 0 en0 127 127.0.0.1 UCS 0 0 lo0 127.0.0.1 127.0.0.1 UH 1 170 lo0 169.254 link#6 UCS 0 0 en0 192.168.1 link#6 UCS 6 0 en0 192.168.1.1/32 link#6 UCS 2 0 en0 192.168.1.1 98:d:67:2c:21:e0 UHLWIir 61 13 en0 1059 192.168.1.9 d8:9c:67:5e:3f:c9 UHLWI 0 7 en0 1175 192.168.1.15/32 link#6 UCS 0 0 en0 192.168.1.88 2c:f4:32:5b:48:41 UHLWI 0 0 en0 1196 192.168.1.181 c:f9:c0:f1:de:ba UHLWI 0 28 en0 1181 192.168.1.190 48:d6:d5:60:f0:ab UHLWIi 1 56 en0 1061 192.168.1.217 78:3e:53:f4:d7:c2 UHLWI 0 28 en0 1181 195.0.0/8 192.168.1.254 UGSc 0 0 en0 224.0.0/4 link#6 UmCS 2 0 en0 224.0.0.251 1:0:5e:0:0:fb UHmLWI 0 0 en0 239.255.255.250 1:0:5e:7f:ff:fa UHmLWI 0 8 en0 255.255.255.255/32 link#6 UCS 0 0 en0 

strange route is the 195.0.0/8 with flag UGSc on non existing gateway 192.168.1.254

I'm able to delete using command:

sudo route -n delete 195.0.0.0/8 

but when I disable and enable Wi-Fi that route is still there.

How can I delete it permanently?

Thanks

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