Status 'F' (document is undone) is set

Message type: E = Error

Message class: EI - Foreign Trade: Gen. Output

Message number: 537

Message text: Status 'F' (document is undone) is set



How to fix this error?

Assigned SD documents already exist. Please check to see which SD
documents are affected via <ZH>Environment -> List of assigned SD
documents</> and take the appropriate steps.

Error message extract from SAP system. Copyright SAP SE.