I recently had to restart because I missed something early on. However, after I downloaded the VM and tried to run vagrant up I got this message in the Terminal:

Vagrant cannot forward the specified ports on this VM, since they would collide with another VirtualBox virtual machine's forwarded ports! The forwarded port to 8888 is already in use on the host machine.

To fix this, modify your current projects Vagrantfile to use another port. Example, where '1234' would be replaced by a unique host port:

config.vm.forward_port 8000, 1234

Sooooo, I changed the place where 8888 used to be to 8886. I then ran vagrant up and it worked successfully. My question is thus:

Is this a bad idea? Also, why did the original error happen?