Hi @burak.
Thank you for using our community.
The trial version of ThingWorx Manufacturing Apps is intended for customers who are evaluating use of the software in their environments, and has therefore been designed for ease of installation. Since this version includes PostgreSQL, it will not install if a separate instance of PostgreSQL is detected on your system. There is no workaround available short of removing the existing instance or installing on another machine.
Regards.
--Sharon
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