Need to move entry stamp in new passport (Malaysia)?

Hey,

I'm going to pick up my new German passport at the embassy in KL after arriving on the normal visa-on-arrival-exempt (90days). I don't want to apply for any new visa, just want to get on a flight to Europe. Do I need to go to Malaysian immigration to move the entry stamp to the new passport or will I be fine to leave Malaysia and just show them the entry stamp in the old (void) passport?

Thank you!