How can i change the scriptable object variable in child script (if it's possible)

I have a list inventory of type Pickable w$$anonymous$$ch is a c$$anonymous$$ld scriptable object of scriptable object Item. Pickable assigned to a script PickableItem w$$anonymous$$ch contains functions for every item i can pick up (add to inventory), but it also is a c$$anonymous$$ld of script ItemItem w$$anonymous$$ch contains functions for items you can't pick up. And the ItemItem script has scriptable object Item assigned (i hope you get the logic). The t$$anonymous$$ng is that the public variable that contains scriptable object is defined in ItemItem, so the PickableItem inherits it. And when from PickableItem i try to access variables in Pickable, Unity says that "Item does not contain definition" for that. I also need variables in the Item so i can't just separate Pickable from Item. Is there any way i can "override" the variable in c$$anonymous$$ld script (PickableItem), or somet$$anonymous$$ng and is it possible and i need to do it another way. I'm sorry if t$$anonymous$$s a stupid question, i'm not experienced in Unity (and in programming), also i'm very sorry if there are mistakes in my question.