WARNING: ROS_MASTER_URI [http://192.168.0.123:11311] host is not set to this machine

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My ROS_MASTER_URI has been working for the last few days, but for some reason today, it just won't connect to my Master anymore. I'm running ubuntu on a VM to another ubuntu machine, which is connected to a turtlebot - I've tried almost everything I could find on the internet

I've set it up like this On my ubuntu machine, where I want my master

ROS_MASTER_URI=http://192.168.0.123:11311

ROS_HOSTNAME=192.168.0.123

and on my VM

ROS_MASTER_URI=http://192.168.0.123:11311

ROS_HOSTNAME=192.168.0.69

My connection is also bridged, so that's not it - I've also put it into my ~/.bashrc - And I can ping fine between the two machines.

For some reason tho, When I start a roscore on my ubuntu machine (where the Master is on) it says "auto-starting new master" instead of just starting the master on the ROS_MASTER_URI I've set