Since techs and "yeets" are obfuscated in the tech tree i have NO CLUE how relevant this is, but it might:
https://imgur.com/a/QtCioHD

Thank you for the report. This is normal when factorio migrates content when mod updates added/removed content. Rubia adds yeet recipes automatically (just like how Quality adds recycling recipes automatically). When other mods add/remove items, their yeet (and recycler) recipes change as well. Since yeet/recycler recipes are autogenerated, the engine is just notifying you of the change.

Oh, right, just for future proofing my save... does the mod give the actual item you're supposed to "yeet" in the tech tree information? Or am i supposed later on to sushi belt every single item in game and throw it see if it sticks? :D

Yeet items have a 2 frame spoil timer, and are solely used for getting credit in terms of technology triggers.

Nah i meant, will i be able to know what items to yeet? The tech tree is full of "?", when i try creative mode and unlock all tech they don't reveal, yet the game generate yeet recipes for everything, so... i concluded that, you cannot know what to yeet and must try everything, that conclusion seem really insane since i play with many mods adding many items

Unknown technologies are revealed when all of its Rubia-based prerequisite techs are completed, and the technology itself could be researched. The revealed technology will tell you what items must be yeeted for it.

The vast majority of yeet recipes simply void items without yielding anything.