Hi Krishna,
Only maintain cosr in okg8. But okg8 config is at company code level. Which means if you have multiple RA's based on scenario , OKG8 config will affect all the RA's.
Other option remove the transfer to accounting tick and create the RA, check with if this worksout , run complete scenario testing. I am not sure on this option.
Other option in okg3 in status control enter just REL status in Cancel Inventory w/Status and Cancel Inventory/Reserves with Status. Do a complete testing on this also.
Thanking you
Vengaiah