BAPI_ALM_ORDER_MAINTAIN for Production Order Component Change

Hi All

I am trying to execute the "BAPI_ALM_ORDER_MAINTAIN" for production order batch change at component level.

I pass the following parameters in the BAPI as below

IT_METHODS

REFNUM -0001

OBJECTTYPE -COMPONENT

METHOD - CHANGE

OBJECTKEY - 12 DIGIT ORDER NUMBER + OPERATION NUMBER

APPEND
REFNUM - 0001

METHOD - SAVE

IT_COMPONENT

RESERV_NO - XXXXXX

RES_ITEM -0001

MATERIAL - XXXX

PLANT -XXXX

ITEM_NUMBER- 0010

ACTIVITY - 0010

IT_COMPONENT_UP

MATERIAL - X

PLANT -X

ITEM_NUMBER- X

ACTIVITY - X

When I execute the BAPI ,I get the below error

E IWO_BAPI 302 Operation number 0010 for component XXXX cannot be changed in the BAPI E IWO_BAPI2 113 Error during processing of BAPI methods

Please share your thoughts to resolve this.