Trace Generation issue when adding priority to process

[Sailesh Sai Teja]

Hello there,

I am trying to have an priority for few process compared to others (In my case I want checkers to always run first). But when I fix the priority I am unable to generate the trace. It's throwing an exception for concurrent execution. May I know what exactly is the issue as I am unable to pinpoint it.

Attached the XML for reference.