Planned delivery costs for PO item &1 &2 incorrectly defined

What causes this issue?

The system cannot interpret the data on the planned delivery costs for
order item &v1& &v2&.
In one line of table ITEMDATA, field COND_TYPE and at least one of
fields COND_ST_NO and COND_COUNT are filled.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

or
The system determines several planned delivery costs for one order
item. For example, the system determines a condition type in field
COND_TYPE in table ITEMDATA, that is defined several times in the
purchase order conditions.

System Response

Processing is terminated. The system does not create an invoice
document.

How to fix this error?

In table ITEMDATA, enter data only in field COND_TYPE or only in fields
COND_ST_NO and COND_COUNT.
If the system determines several planned delivery costs for a single
order item, enter data in fields COND_ST_NO and COND_COUNT instead of
in field COND_TYPE.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.