Sometimes I get an error message across the entire screen (very annoying): Failed to replace stone axe with stone axe.

I have one stone axe in inventorio slot and one stone axe in regular slot (in my hand).
Not really sure when it's triggered, but sometimes I switch between my axe and some random other tool, try to cut down a tree and then it throws this error.

What is causing this and how can it be avoided?

I am using this mod alongside with Inventorio.

these notifications can be controlled in the configuration screen which opens with R+C
In the Auto Refill section

Could you release a bug fix for this issue?
If there are some logs that I can provide, let me know.

well IPN doesn't understand Inventorio slots. From IPN point of view they don't exist.

Also the vanilla click functions that IPN uses to manipulate the inventory doesn't work with Inventorio slots. Well don't work while the inventory is not opened.

checking if it's even possible to have more tight integration https://github.com/Lizard-Of-Oz/Inventorio/issues/104

Well this seals more integration with Inventorio as not really possible https://github.com/Lizard-Of-Oz/Inventorio/issues/104#issuecomment-1023573192