Can I combine Morpheus8 and hyaluronidase?

Yes, you can. Length between treatment depends on the case. I recommend speaking with a board certified physician to discuss your options. Best, Dr. Emer. 

Thank for your question. While Morpheus has a theoretical risk of increasing the rate that filler is absorbed, it is not used as a substitute for hyaluronidase for HA filler reversal. Morpheus remodels the skin and the subdermal fibroseptal network and can be adjusted to cause lipolysis (kills fat). Depending on where the filler is located, if the treatment is done at the location of the filler it can heat the filler and increase blood flow, thereby further increasing the absorption rate of the filler.
Hyaluronidase is more like an "antidote" for HA filler. It's  directly injected into the filler and dissolves it basically right away. I wouldn't do the treatments at the same time only because Morpheus will cause swelling (even if subtle) and will make it harder to confirm the filler was correctly dissolved for a few days.

First, I am sorry to hear that you were over filled.  Luckily that can be reversed.  You definitely can do Morpheus 8 over filler.  If the filler is superficial, it will help dissolve it, but the hyalronidase it a better way to address the problem. The morpheus 8 is a great way to tighten skin without surgery.  The combination of miconeedling (up to 4mm deep, Morpheus 8 is only devise that goes that deep) and radio frequency gives you the most effective way to resurface the skin, reduce wrinkles and tighten the skin without surgery.