[F2] cannot be used here

What causes this issue?

The cursor was not in the correct position.

System Response

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

How to fix this error?

Details only exist for actual data rows.
Make sure that when you request details, the cursor is not positioned
on a title line or a continuation line.
If you double-click the mouse, the current position of the mouse
pointer is decisivet.

Error message extract from SAP system. Copyright SAP SE.