Hi, I'm doing a course on AWS where I have to add a subnet, I already placed one before and it was a success, but I can't create this second one. This is the data I'm using to address:
IPv4 CIDRs: 172.31.0.0/16
and I want to add in the form IPv4 CIDR blockInfo the following: 172.31.0.1/16
It sends me the following error: CIDR Address overlaps with existing Subnet CIDR: 172.31.0.0/16.
but in the calculator it indicates that I can use that address, since it gives me this range: 172.31.0.1 - 172.31.255.254
What am I doing wrong why can't I use 172.31.0.1/16 ?