What is parent class/inventory class/pickup class of item hold buleprint?

ok im working on broken inventory system
for now i can pick up item from ground but look like they are dont know where to go
because i change so much “brah brah brah” blueprint class setting to test it work or not work
i lost the orginal class setting of my blueprint

on my character blueprint my “additem” function is work fine
“increase inventory amount / assign texture for hud / set array elem” - it working

but everything after that just gone

so i check the inventory blueprint class setting that i already forgot orginal “brah brah brah” class setting
1 itemhold blueprint - parent class is actor / inventory class is inventorymain / pick up class is none
2 inventorymain blueprint - parent class is itemhold / inventory class is childinventorymain / pickup class is none
3 childinventorymain blueprint - parent class is inventorymain / inventory class is none /pickup class is none

i know this is my issue sure

my english is bad but i need some help please
i am really noob and just start