Stuck on mission, maybe "Replace all worn out parts"?

[Yakari]

You should not use any parts from previous missions, even though they are "100%". Broken pieces needs always to be replaced with brand new pieces from shop. Also you should note that 80% worn out pieces are not broken, just focus on red ones etc.

I found one thread where developer commented on this issue:
"You did not repair worn out parts - you placed there used parts which are not new - game will not let you use used pars on key components that need to be replaced."

Link to the thread: http://steamcommunity.com/app/270850/discussions/0/558746089184552927/#p1

Enjoy the game people, not that big of an deal..even though I lost 30min on figuring that out. =)