I'm unable to update:

<pre><code class="shell">
warning: cannot resolve "libtraceevent.so=1-64", a dependency of "libtracefs"
warning: cannot resolve "libtracefs", a dependency of "ndctl"
:: The following package cannot be upgraded due to unresolvable dependencies:
ndctl

:: Do you want to skip the above package for this upgrade? [y/N] y
looking for conflicting packages...
error: failed to prepare transaction (could not satisfy dependencies)
:: installing xfce4-session (4.18.2-1) breaks dependency 'xfce4-session<4.18.2' required by libxfce4ui
</code></pre>