How to combine 2 levels?

Hi TJ,
I tried following your steps in UE4.9.2 and getting the following dialog box:


Maybe I haven’t followed your steps correctly or something has changed?


Contents of dialog box for future searches:

Title: Pasting to Hidden Level

Contents: You are trying to paste to a
hidden level. Suppressing this will
default to Do Not Paste.

Two buttons: 1) Unhide level and paste 2) Do not paste