A320 Engine valve alert

With the A320/A321/A319, when I switch the engines off, I have a message alert :

"FUEL ENG 2 LP VALVE OPEN"

can anyone tell me if I did something wrong ? Where does this come from ?

Quote from Jet-Pack (IPACS)

Did you perhaps press the engine 2 fire push button on accident?

I don't think so. I did the whole procedure as in the tutorial

Quote from ThomK

A319 takeoff from cold and dark, Exit Power switc on and then switch off engine 1/2. I didn't get any error messages. (Android Global)

I did a full flight again, begining with cold and dark (first time I do this). No message alert when switching the engines off . Until now, I always started airbus flights with "before engine start". So maybe I missed something, I don't know...