when saving maintenance orders i get this abap error "ITAB_ILLEGAL_SORT_ORDER" anyone know why ?

Hello,

yesterday i had a problem in maintenance order's cost calculation, i checked SAP note 3040264 and i found the solution to it but now i have another problem, when making new maintenance orders i get an ABAP error and i can't save them, i tried to undo the customizing i did in the note but it is not possible, can anyone help me by explaining to me what is going on and how can i solve it ?

Note that i can save the order if i don't release it.

Thanks in advance