dysable use item

[michael95]

I have when actor use item, he learn some skill, but must be on level 1 or higher (this is test i se in future level 5)
The item is not consumable, so I want when the skill is already this character learned (I have skill shop) disable use this item for this character, but stay enebled for others. How to do?
Here is picture for better understanding.

[JonFawkes]

On the conditional branch for [Chara] is [Skill] learned, why don't you just add the item back into the inventory? That is what I do for a similar common event where you can get an item to give a player stat points if that player exists.