How to reject LibreOffice Calc autocomplete suggestion?

LibreOffice Calc likes to aggressive suggest cell content based on a prefix.

It is easy to accept the suggestion by hitting ENTER.

But how to I reject it, which is something that is needed even more often?

There is a perfectly good key for this on the keyboard, namely ESC, but it does nothing.

N.B.

I do not want to disable Autocomplete, I just want to reject its suggestions.

Solution 1:

Entering Ctrl+Z should nullify the suggestion.

A user has suggested in this post that it would be easier to use the key sequence =backspace, as the keys are right next to each other.