I do not think you need to have it replaced.
As a GC holder coming back to the US, you do not need the I 94 ( neither the green one, nor the white one ( people with visas ) ). At the border, usually, you just have to show passport and GC.
How did you get your GC ?
Because if I well remember some posts here, when you go to the interview ( if AOS ), the officer when approving your case should have removed the I94 in your passport.