Enter the cost center or order or WBS element

What causes this issue?

You have entered at least two of the CO account assignments, cost
center , order, or PSP element in the cost distribution.

System Response

In theory, this is possible, but in an ALE distribution scenario,
whereby the account assignment check is carried out remotely in the
accounting system, accounting must run in an SAP release status of 4.6
or higher. This is not so in your case.

How to fix this error?

Assign every line of cost distribution only to a cost center, order or
a PSP element.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.