ip address is something a phone number, so no two computers can have same IP. now the "ip address conflict" error clearly means two computers on your network are trying to use same IP which is wrong and hence the error.
to fix this, all you need to do is make sure no two computers use the same IP address. so for example, if your desktop as IP address 192.168.1.5
Give your phone IP add as 192.168.1.6 and your laptop as 192.168.1.7
Hope it helps