Safeguard 400 DSDI 110A Replacement

Hi,
I have Safeguard 400 with Digital Input Boards DSDI110A.
My Question, Can I replace online DSDI110A with DSDI110AV1 Board at one Side Only (For example if one DSDI110A Board is deffected at Side A) and leave the other Side with DSDI 110A?
Or I need to change the Boards at both Sides even if the other Side Board is not deffected?

Thanks