CreateSchema is emptying the database

At what point do I execute CreateSchema= true ?

when I startup my daml server ?

I see that at least 1 table is created in the database. I think 2 others but have not figured out which ones

also after I execute CreateSchema= true for a second time the content of this table seemed to have been wiped out

You would CreateSchema=true only the first time you initiate your database. Every time you run the command after that you’d want to use CreateSchema=false so it doesn’t wipe out the data.