Check your OKB9 settings again. If you will not set a default cost center for G/L account in KA02, then you have to set a default cost center in OKB9.
Check the another discussion cost center error in miro
Else post your screen shot for OKB9.
Check your OKB9 settings again. If you will not set a default cost center for G/L account in KA02, then you have to set a default cost center in OKB9.
Check the another discussion cost center error in miro
Else post your screen shot for OKB9.