routing already in table when trying to add additional route to the same net

I have the following table

$ netstat -r -4 | grep 33.0192.168.33.0/24    192.168.29.4       UGS      ovpns5

I would like to add additional route to the same network and get

$ route add -net 192.168.33.0/24 192.168.27.2add net 192.168.33.0: gateway 192.168.27.2 fib 0: route already in table

Why? Isn't it possible to have two routes to the same net?

I can do route change and it works.