For altering the account assignment data, what is the correct procedure?
If, for instance, you want to alter the account assignment category:
Note You need to first delete all the existing account assignment data for the appropriate item.
This can be done by initializing (deleting) the account assignment category and confirming the same by selecting ENTER.
After this, you can enter the new account assignment category and the appropriate account assignment data.
If you want to modify the change account assignment data for the pertinent item;
For instance, if you want to alter the main account assignment objects like sales order, WBS element, cost center, G/L account and network, and so on and so forth. We suggest that you delete all the existing account assignment data by initializing (deleting) the account assignment category and then confirm the same by selecting ENTER.
You will be required to delete the account assignment line on the account assignment screen, in case you are working with contracts and enter a new line for ensuring that the data derived is correct.
During operation, customizing should not be modified.
For instance, in few situation, the requirements type (OVZH) or the valuation of the requirements class (OVZG) is altered when the post purchasing document is created.
This can lead to errors in a valuation of goods movements (goods receipt, for example) and should be avoided.