network manager changing default 10.42 to custom ip range

Want to configure AP or DHCP server using Network manager but
finding it difficult to get rid of the pre-set 10.42.0.x/24 network ?

Here is how it can be fixed.

Setup a Hostspot or a network from GUI (nm-applet).
the GUI may not give options to set IP address. Dont worry

lets say the name of the connection is bhasker



$ nmcli  c
NAME                    UUID                                  TYPE             DEVICE
bhasker                 8f2a5550-d7c0-48f3-a5e5-e39beee0ed58  802-11-wireless  ap0

$ nmcli  c modify bhasker ipv4.address 172.17.1.1/24

(please note the /24. This is important or else dnsmasq will complain)

$nmcli c up bhasker

thats it ! you now have a DHCP range in 172.17.1.x and an AP !