Error: Create instance backup: failed to add "Backing up instance" Operation ce56e357-1cf1-4e6a-a4a4-23340fea511d to database: no more rows available

Hello,
I’m trying to backup containers, but got:

Error: Create instance backup: failed to add "Backing up instance" Operation ce56e357-1cf1-4e6a-a4a4-23340fea511d to database: no more rows available

How to solve it?

UPD: There were not enough space.
So, I freed some space, but now I have

Error: Create instance backup: LXD is shutting down

while I’m trying to lxc export

The LXD is shutting down is just an indication of it restarting for an update. It waits for operations to complete before restarting but has a 5min timeout, so it should all have cleared by now.

Thank you, @stgraber!