When I tried to do so, the selected logistic items are marked to upgrade to fast version (Fast inserter/belt/ug belt/spliter) instead.
Applied using GUI [Upgrade planner config] then [Upgrade Planner] from shortcut mode
Can you please tell me which mod the Ultimate Inserters are from so I can test it locally and fix the issue?
Please also attach a screenshot of you config.
Thanks in advance.