There are still open purchase order items or scheduling agreements

What causes this issue?

You wanted to change the valuation class or the profit center. However,
open purchase order items or
<DS:GLOS.3526C014AFAB52B9E10000009B38F974>scheduling agreements</> still
exist for the material. This can result in inconsistencies if goods
receipts and invoice receipts are posted for the corresponding purchase
order items.
<ZH>Note</>
This message or the setting in Customizing for this message (see below)
is also relevant if the
<DS:GLOS.3526C022AFAB52B9E10000009B38F974>material type</> of a material
is changed and if the new material type requires another valuation class
to be assigned.

System Response

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

How to fix this error?

Close these purchase order items and flag them for deletion.

Procedure for System Administrators

In Customizing for the <LS>Material Master</>, you can define that this
message appears only as a warning. You do this in
<DS:SIMG.SIMG_CFMENUOLMSOMT4>Define Attributes of System Messages</>.
However, first ensure organizationally that further processing of the
purchase orders cannot result in inconsistencies.
Due to the importance of this message, it still appears as a warning
even if you assign the message type <LS>No message</> to it.

Error message extract from SAP system. Copyright SAP SE.