Have you read this?
https://lists.uni-koeln.de/pipermail/linux-fai/2020-April/012479.html
>>>>> On Tue, 16 Jun 2020 09:31:46 +0200, Andreas Heinlein <aheinl...@gmx.com>
>>>>> said:
> Hello,
> when trying to upgrade the nfsroot, we get
>> dracut: Generating /boot/initrd.img-4.19.0-9-amd64
>> dracut: dracut module 'livenet' cannot be found or installed.
>> dpkg: error processing package dracut (--configure):
>> subprocess installed post-installation script returned error exit
>> status 1
--
regards Thomas
