need advice

I just mastered a cd. It is an old montage, no plugins. I opened it and and master the cd but then realized that my Fireface800 was at 48khz. I normally work at 44.1 and the montage is all 44.1 files.
The cd appears to be fine.
Is it better if I remaster the cd?
Does Wavelab7 can work with the files at 44.1 and the soundcard at 48?
I am on PC.