The problem that we got, was the result op the QPI installer.

We got the advice of Qlik to do the following:

- make a complete backup of QlikSense and the database

- uninstall qliksense and postgreSQL.

-install the same version of QlikSense that you are using with the Qliksense installer.

This will make use of the integrated PostgreSQL deliverd with QlikSense installer.

- -restore the database

- upgrade Qliksense to the new version. 

We done all above and this solve our problem.

Now lets wait and see what will happend with the next upgrade!!!