Command \highlight already defined.

After updating changes package to 3.1.2 version, compilation throws me this error message:

/usr/local/texlive/2018/texmf-dist/tex/latex/changes/changes.sty:780: LaTeX Error: Command \highlight already defined. [}]

Where line 780 is the last of this chunk of code:

\newcommand{\highlight}[2][\@empty]{%
\setkeys{Changes@highlight}{#1}%
\ifIsEmpty{\Changes@highlight@remark}%
{}%
{%
\ifIsEmpty{\Changes@highlight@comment}%
{%
\PackageWarning{changes}{You used the deprecated option 'remark' in your markup, please use 'comment' instead.}%
\let\Changes@highlight@comment\Changes@highlight@remark%
}%
{%
\PackageWarning{changes}{You used both options 'comment' and the deprecated 'remark' in your markup, please use 'comment' only, the content of 'remark' will be ignored.}%
}%
}%
\Changes@output%
{highlight}%
{\Changes@highlight@id}%
{#2}%
{}%
{\Changes@highlight@comment}%
{\changeshighlightname}%
{#2}%
}