linux – RTNETLINK answers: File exists in alpine router

I already know that this ask may already be made here but i couldnt solve this there, idk if i made bad or something, so im asking with my own case, sorry if my english is bad but here it is

this is how i have the content of /etc/network/interfaces


for some reason, when i do ifup in eth1 it retrieves RTNETLINK answers: File exists but the strange thing is here:

it only happens in up ip route add … …

but if i comment the line and uncomment the, and any other line below…

this works, everything works, my virtual machines connect well with the router and with internet, but its not what i need cause i have all my virtual machines with 192.168.1…. ip`s, and cant change it now, so i need this route to be 192.168.1, and well, i have the said error message

and thatas all, thanks for reading, im still studyng so this can be a problem ogf how i configure anythin, but cant imagine what can be
if anyone has any idea of what can be or how to solve this, im glad of reading