Request more than question

I have the answer already, but I'm annoyed that I took the error message at face value and spent clock cycles trying to figure out whether there really was a problem somewhere (other than my stupid fingers and thick brain).

I had tried to add a route to a peering connection and typed in a CIDR of 10.100.0.0/0, and was presented with a message:

The route identified by 10.100.0.0/0 already exists.

Thankfully before I spent too much time examining the myriad routes in our setup to find the duplicate, I had the presence of my co-worker to look over my shoulder and he caught right away that I should have typed 10.100.0.0/16, which resolved the issue. I'd been typing 0.0.0.0/0 too much lately.

I went to a CIDR calculator as a reference and much more clear:

Invalid CIDR format

I would appreciate it if you would change the error message to something more accurate. The route identified by 10.100.0.0/0 CAN'T EXIST