Am I the only one getting this message from calibre when uploading to a device, a Libra H2O in this case, since the latest firmware update? I just started seeing this message now, but I thought I'd uploaded books before since the update. But maybe I hadn't.
I should probably point out that I've done some patching and the NM/Plato/KOReader one step installation.
Your Kobo is running an updated firmware/database version. As calibre does not know about this updated firmware, database editing is disabled, to prevent corruption. You can still send books to your Kobo with calibre, but deleting books and managing collections is disabled. If you are willing to experiment and know how to reset your Kobo to Factory defaults, you can override this check by right clicking the device icon in calibre and selecting "Configure this device" and then the "Attempt to support newer firmware" option. Doing so may require you to perform a factory reset of your Kobo.
Device database version: 160.
Device firmware version: (4, 22, 15190)
I did check "Attempt to support newer firmware" and am not having any problems as far as I can see.