Vendor is determined automatically

What causes this issue?

The system could not find a unique purchasing organization for the
plant, or several purchasing organizations are possible. However, a
unique purchasing organization for the plant is required, in order to
determine the pipeline info record for the material and vendor.

System Response

The system will cancel the vendor number that you entered and will
retrieve all pipeline info records for the material.

How to fix this error?

Press ENTER. If more than one pipeline vendor is possible, select the
required vendor.
IF &[SWITCH]S4H_DOCU_ON_PREMISE& = 'X'.


Procedure for system administrator
In the Customizing section for the company structure, assign a standard
purchasing organization to the plant.
<DS:SIMG.SIMG_CFMENUSAPCOMKI>Proceed</>.
ENDIF.

Error message extract from SAP system. Copyright SAP SE.