Automatic IP address get repeated IP address

Hi, when edge draw IP addresses from the super node(skip -a ), the ip address is often repeated, how can i fix this problem ?

Example:

Edge A Mac address : 00-FF-D6-7D-AF-9E IPv4: 172.17.9.45 OS: WIndows 7/10

Edge B Mac address :00-FF-C9-09-DB-0A IPv4: 172.17.9.45 OS: WIndows 7/10