Created Unassigned: Upload Daemon Error [178]

Hi,

I have installed SBFspot and Upload Daemon on my RaspberryPi following the tutorial.
Everything worked fine for some days including uploading the data to PVoutput.

Now I find following error in the log: ERROR: Upgrade your database to version 1
I thried to reinstall SBFspot and Upload Daemon but the error keeps.
Data is collected from the inverter and written to the .csv files as expected.

Any suggestions to solve this problem?