TrueNAS console uses wrong VGA

I’ve added an Arc A310 for transcoding a while ago. Since then the TrueNAS console doesn’t get displayed on my IPMI’s VGA anymore but instead on the A310 - whether I plug a display cable in there or not.

I cannot find any setting for the preferred primary display or anything similar in my BIOS.

How do I get TrueNAS to use the correct VGA?