Lines chosen containing no orders will be ignored

What causes this issue?

You have chosen lines that contain <GL:maintenance_order>maintenance
orders</> and other lines too.

System Response

The system can only perform the required function for orders. Lines
that do not contain orders will be ignored when the function is
performed.

How to fix this error?

INCLUDE 'VERARBEITUNG-ENTER' OBJECT DOKU ID TX LANGUAGE E

Error message extract from SAP system. Copyright SAP SE.