Invalid Item (850015)

invalid item when looting low grade fuel from custom static object..

prefab filter fuel_tank_a_600
interaction open
container size 1
allow stack  enable
liquid disabled (tried enabling this same issue)
persistent true
Contents:
1 Low grade fuel
No custom name
No skin id
amount 25 - 500
spawn chance  3 times in 5
lowgradefuel[-946369541]

Yet when people loot it it says invalid item. What is wrong?
 

delete this comment bellow the above comment. duplicate.

reloaded plugin same issue. do i need to delete any config file or data file perhaps?

see anything wrong with the above picture on why it's doing it?

could it be stack modifier? or a custom loot plugin that modifies the loot tables?

FYI it was Better Loot plugin on umod. this plugin is not compatible with this plugin.
Update: Nevermind it started happening again.. ughh

I just said screw it and downloaded the attached setup and that works so i just won't do any custom ones for now.