Thank you!
So I can't just write a line to delete all peoperty keys, right?
Yeah that's right, there is no alternative option right now:)
Delete the neo4j folder in the databases folder and it should be good but you will have to recreate a database after.
Did you shutdown the server before to delete the folder and did you restart it after?
You should open another topic for this problem.
Thank you!
Yes, I did shutdown the server before I delete the neo4j folder and restart it.
But it turns out to be the picture I sent. So I delete the whole folder and download a new community version 
Now it's ok.
I will open another topic when I have to create a database after.