If you deleted the user datas using the button in "Optionen" and do not close the application, you can't create any new "doors". The program says "Dieser Name ist schon vergeben".
If you choose to close the application and restart it, there is no such problem.
Probably there is a problem with either the database-connection or with the sql-statement used to insert a new door-entry.
Issue solved using the deleteOnExit() option instead of the delete option as we used to do by solving the issue "Program / Delete user's settings and database".
If you deleted the user datas using the button in "Optionen" and do not close the application, you can't create any new "doors". The program says "Dieser Name ist schon vergeben". If you choose to close the application and restart it, there is no such problem.
Probably there is a problem with either the database-connection or with the sql-statement used to insert a new door-entry.
@hlucca That seems to be a Bug for you...