3106967 - WBS Element entered, but the field requirement error still happens

You made configuration on SSCUI 102393 Define Field Status Variants. Set the WBS Element to "Req. Entry". Afterwards, the Field Status Group was assigned to the respective account. (SSCUI 150001 Manage G/L Account Master Data).

You created outgoing invoice with apps Manage Sales Orders and Create Billing Documents.
Even the WBS Element was indicated, the error message still occurred on posting the respective billing document.

"Document xxxxxxx: WBS element is required for G/L account xxxx xxxxxxxxxx"

SAP S/4HANA Cloud Public Edition

WBS element, field status group, mandatory, profit. segment, profitability segment, assignment. , KBA , CO-PA-2CL , Profitability Analysis (Public Cloud) , CO-PA , Profitability Analysis , How To