How does work form RouteInventProd in Ax2009?


I have following problem.

In form RouteInventProd there are data from Routeversion table in upper part and in lower part is data from ProdRoute. Why? How is possible? I expected that there should be data from Route table but not from ProdRoute.

I want to do one own function that works with RouteId and RouteOpr but in ProdRoute doesn’t exist RouteId. Is there way how to do please?