html - Stop LastPass filling out a form

Question

Is there a way to prevent the LastPass browser extension from filling out a HTML-based form with a input field with the name "username"?

This is an hidden field, so I don't want any software to use this field for their purposes:

<input type="text" name="username" id="checkusername" maxlength="9" value="1999" class="longinput" style="display:none">

The solution should not be like "rename the input field".

Answer 1

Adding

data-lpignore="true"

to an input field disabled the grey LastPass [...] box for me.

Sourced from LastPass.com