Too much oil in Rear Diff

With 20 hours on the new Grizzly. I wanted to do the engine, rear and front differential oil change.

Mistankly filled rear diff to the top of the filler plug without taking off check level plug.

So, I opened Check level plug and of course it’s and endless supply of oil coming out.
Should I just drain it completely or wait over night for it to level off from the level plug?

Plus now I can put in Gold drain plugs