Ok to mix rev version on Siemens simodrive Lt module 25 amp 6SN1123-1AA00-0BA0?

[markp]

Is it ok to mix rev versions on these drives? I see lots of rev A versions for sale on the used market but few version C. Im replacing a version C. Ive got the optical style modules installed in the 6SN1123-1AA00-0BA0 Im replacing.