Error creating multiple tables sqlite android

Question

I'm tired of trying all the methods to solve what the title says, this is my code:

public class AdminSQLiteOpenHelper extends SQLiteOpenHelper {

    public AdminSQLiteOpenHelper(Context context, String nombre, CursorFactory factory, int version) {
        super(context, nombre, factory, version);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {

        db.execSQL("create table usuarios(placaVehiculo text primary key, tipoVehiculo text )");
        db.execSQL("create table configuraciones(indicador text primary key, descripcion text )");

   }

}

the table called "usuarios" is created, but the table called "configuraciones" is not created, i do not know what else, what i can do to create more than two tables??, pls help me.

This is the parametres when i called the database:

 AdminSQLiteOpenHelper admin = new AdminSQLiteOpenHelper(this, "administracion", null, 1);
 SQLiteDatabase bd = admin.getWritableDatabase();