While I am not familiar with your specific router, I have had experience with cross threading in other instances. So I am answering with this question, can you file the treads back into alignment? I have several triangle shaped files, and a couple of flat on one side/kind of round on the other that have a very sharp edge which can get into threads pretty well. I have sometimes been able to chase the threads around with the file and clean them out, of course other times the damage is too great to repair, but it's a thought.
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