How I can solve this problem?
Try rebooting dom0.
After my system crashed and rebooted I had the same error message. I was able to fix it by issuing the following commands in dom0:
- dom0: lvdisplay (and searching for the path to the logical volume, e.g. lvdisplay|grep vm-sys-net-volatile)
- dom0: lvremove (e.g. lvremove /dev/qubes_dom0/vm-sys-net-volatile)
My expectation was that the volatile logical volumes are only temporary. So by deleting it I only lose the temporary changes after the last reboot of the VM. It worked like expected, but I didn’t check for any data loss. I was able to boot the VM and all was working like expected.