How To Fix STB_WZ_WIZARD012 - Include '&1' does not belong to program '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: STB_WZ_WIZARD - Messages for ABAP Workbench Wizards

• Message number: 012

• Message text: Include '&1' does not belong to program '&2'

What causes this issue?

You want to include data or program elements in an Include that already
exists, but does not belong to the program. In other words, this data
or program elements are not included in the program.

System Response

The system rejects the Include names.

How to fix this error?

You have two options for the Include names
Include does not yet exist
The system creates the Include, placing the data or program elements in
this Include and including it in the program.
The Include exists and is already included in the program
The system puts the data or program elements in the Include.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.