Hello Nikos,
Generally we will use CO07 (Production order creation with out material reference) for rework scenario i.e. same material can be processed and the out put material also would be the same
But in your case your parent material will get consume and child components will come to the stock
so in production order maintain your FG material as GI and maintain the child components which you have to receive as GR
Then do the manual MB1A Transaction GI - 261 Movement for FG /MB31 for GR-101 Movement for child components
Regards,
Venkatesh..
