I've done that twice, if you backtrack my replies. RC_MCU V2.0.0.3 is never applied, it stays on RC_MCU 1.0.4.2 (I'm not the only one).
My reasoning was: header.json references both versions, but 1.0.4.2 first. Can I delete the reference to it from header.json and thus update the RC_MCU?
Edit...