TrueNAS

Hi, I hope someone will read this and give me a nudge in the right direction. The TrueNAS documentation is....not very helpful. (it actually sucks, because they changed so much with 25.10/SCALE)

Here's what I did: I had to replace the system-ssd of my 4/1-bay-TerraMaster because of age. No biggie, just export settings, replace SSD, install new TrueNAS Scale and import settings.

It went surprisingly well with the usual hickups, nothing too bad. After importing the old settings the pool went back up and NFS shares were there. Just a minor problem I can't fix by myself (I'm not good at the whole certificate-stuff). After the import the self-signed certificate was overwritten with the old one, without a private key. And there is absolutely no way to create a new one. I don't want to go acme or create my own authority, I just want a simple self-signed cert for the WebGUI. How do I accomplish this?

Thanks in advance.