Low morale on weapon

[Riversilk]

Items with personality have the morale stat, which can go up and down depending on several factors.
A large number of these items lower their morale after each fight.
Whenever the morale reach 0 you cannot use the item anymore, but need to "suppress" its guardians -> right click on weapon and click suppress.
You'll have to fight the item guardians the same way as you do when you upgrade the item. If you win, weapon morale is set back to 100.

p.s. Item race has no effect on morale, other races' items can have morale too.