Orcad PCB editor warning (Spmhdb-213)
That means someone created that old board with a fancier, more expensive license than you currently have.  Orcad PCB and Allegro come in different tiers with different options. So for example I have options like "advanced miniaturization" to help with stacking laser micro-vias. We also have several other productivity options. If you open one of our files on someone else's machine with just a regular license, then Orcad will warn you about it.

In your case I'm "guessing" the board was done in a tool with maybe some high-speed routing rules option, or other DRC constraints. You have a lower level tool and it cannot use those constraints but it knows they're there. So I think it's warning you like, hey the last guy set some constraints on this board and I can't check them... so you might easily break a bunch of things without getting any warnings.