Eric is right, it isn't a huge deal right now. They could potentially take over and eliminate the Dubia since they breed much faster. But that is long term. Short term, there will be no harm. Mid term, I would be looking to get rid of them as soon as possible, like Eric said next time you sort em out. If any of those Turks are mature females, then I would step up my game plan much sooner though and try to prevent them from laying ooths in the Dubia bin to keep it under wraps before it happens.
Turks and Dubia look totally different, so something that would work very well is to take small batches of all the roaches out (a couple hundred at a time) and put them in a container with a lid, slap them in the fridge for 10-20 minutes. They will appear dead after they have cooled down enough and it is much easier to pick out the Turks then. You have to work quick when you pull them out of the fridge, because they will be warmed back up and running around after about 5 mins. This does stress the roaches to an extent, but it will not kill them, just don't leave them in the fridge overnight.