Good day NewB,
First you are seeing Name1 because to the DataElement linked to KNA1-NAME1 field in you declaration.
The solution to your problem is to create a new data element that looks like Name1_GP.
Then give it the field name : customer name. The change your declaration to reference new data element.
See below screen for example & problem.
Please if correct award points.
Regards,
Tumelo Modise