How To Fix WXP305 - Characteristic name "&1" is within the SAP name range

SAP Error Message - Details

• Message type: E = Error

• Message class: WXP - Retail Planning

• Message number: 305

• Message text: Characteristic name "&1" is within the SAP name range

What causes this issue?

You have included characteristic &V1& in your info structure. The field
name which you have chosen is not, however, in the SAP name range.
Customer-specific database fields are to start with "YY" or "ZZ".

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

INCLUDE ISR_VERARBEITUNG OBJECT DOKU ID TX

How to fix this error?

Rename the characteristic.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.