No equipment exists with this serial number

What causes this issue?

You have called up the function <LS>Equipment</> to display the
equipment master record for this <GL:serial_number>serial number</>.
However, no equipment master record exists for this serial
number.

System Response

INCLUDE 'KEINE-FUNKTION' OBJECT DOKU ID TX LANGUAGE E

How to fix this error?

Before you can display an equipment master record for this serial
number you must create one in the 'change' mode with <LS>Goto</> ->
<LS>Equipment</>.

Error message extract from SAP system. Copyright SAP SE.