Custom OID graphs gone after nightly update

Help
4

This new conditional seems to be causing the problem:

if (is_file("includes/html/pages/device/graphs/$group.inc.php")) {
    include "includes/html/pages/device/graphs/$group.inc.php";
} else {
    // original code

If I remove/rename this file the custom OID graphs are shown again:

/opt/librenms/includes/html/pages/device/graphs/customoid.inc.php

I don’t know if that’s a valid workaround?