How To Fix WS161 - Account key not maintained for settlement document type &1

SAP Error Message - Details

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 161

• Message text: Account key not maintained for settlement document type &1

What causes this issue?

The Customizing settings for settlement process type &V2& and settlement
document type &V1& are inconsistent.
You have entered <AB>X</> <LS>Net</> or <AB>B</> <LS>Gross</> in the
<DS:DE.WVOLP>Post Business Volume in Accounting</> field for the
settlement process type. However, you have not entered a value in the
<DS:DE.KTOSL_VE>Account Key for Clearing Line</> field in the
settlement document type and this is required in this case.

System Response

INCLUDE ISR_VERARBEITUNG OBJECT DOKU ID TX

How to fix this error?

Enter the required account key for settlement document type &V1& or
change the setting for the business volume posting for settlement
process type &V2&.

Error message extract from SAP system. Copyright SAP SE.