Ok I’m back to answer myself ^^’
There is a little “hack” possible to be able to do that.
You just have to create a similar item to your “target” one, but for that you must use the exact pathname and itemname
For exemple, I want to spawn the item “Blueprint’/Game/Mods/Custommod/Customsubfolder/PrimalItem_name.PrimalItemname”, so I must create another mod folder in the Dev Kit, with the name “Custommod”, and a subfolder on it, with the name “Customsubfolder”, then finally the “fake” item “PrimalItemname”.
When you compile your mod, it will take the full path and when you use it, just put your mod after the one containing the target item, in the mod loading list, and it will work 