Squash MR commit with breaking changes

In my project we set a squash commit template to squash my MR commits and have a cleaner history.

What are the best practices to squash the commits when a MR have a breaking change? My current template dont mark my squashed commit as having breaking change.

Template:
%{title}

    %{co_authored_by}

    Merge aceito por: %{merged_by}

    %{approved_by}

    %{reviewed_by}

    Merge Request %{reference}

    %{issues}