Alt + Backspace clears selected guide but is not a documented shortcut

How to reproduce:

- create a new document, add a guide

- select the guide by clicking on it

- make a rectangular selection

- use ALT + Backspace to fill the selection with the foreground color

Result:

- the selected guide is cleared and the selection is not filled as expected

This shortcut for clearing guides is not documented, at least it is not configured on my Photoshop under the keyboard shortcuts for this menu entry.

Using Photoshop 25.5.0 on Windows 10.