[Kobo] database disk image is malformed

I have two Kobo devices. On one of them I have no problem, the other suddenly can't communicate with Calibre (or vice versa, rather).

The error message is this:

CorruptError: database disk image is malformed

Traceback (most recent call last):
File "calibre\gui2\device.py", line 89, in run
File "calibre\gui2\device.py", line 515, in _books
File "calibre\devices\kobo\driver.py", line 1878, in books
File "calibre\devices\kobo\driver.py", line 2970, in get_bookshelflist
apsw.CorruptError: CorruptError: database disk image is malformed


Is there a remedy for this? The device functions fine, except that the last batch of books I had sideloaded have suddenly been wiped from it. And I now get this message.

(Windows 10. Calibre 5.22.1 (64-bit)