Two Pi 3 using Volumio, Database Problem

I’m using two rasperry 3b+ using Volumio 3.233, both get their data from a SSD attached two my fritzbox.

(3b+, hifiberry dac pro +, 7" display, plugins: gpio buttons, now playing, touch display, system information)

(3b+, hifiberry dac plus, plugins: system information)

When using the first one everything is fine.

Now using the second one it’s got a problem with the database, red error. I need to actualize the database which happens really fast, it needs only a couple of seconds. But I need to do press the ‘actualize’ button in ‘sources’.

When I change to the first rasperry back, the same happens again.

Only using one of them there are no problems.