SAP Message BK096 - You cannot select the transaction currency. It is adopted automatically.

Diagnosis
You marked the "Choose transaction currency" field.
This function cannot be performed because either

  • you entered an existing document as a reference

  • the "All currencies" indicator is not active in controlling area &V1&.
  • System Response

    • If you entered a reference document, the currency in the reference
    • document is transferred.
      • If the "All currencies" indicator is not active for controlling area
      • V1, you can only enter a document in controlling area currency. theSAP System uses this currency automatically in the document.