My current maxtery never reach my max mastery

[Portgas]

May someone explain to me why my current mastery never reach my maximum mastery on my character?

you guys may look on video i uploaded that i should reach my MAXIMUM mastery after i upgrade some item i equip , but that didnt happen to me . i already equip my best gear on me .

🙁

 

[Ollie]

The fact is that the maximum mastery indicator is remembered for each of the equipment slots.

Once upon a time, one of the equipment slots contained an item with more mastery than it does now.

When you upgrade the equipment in this slot, the indicators of maximum and current mastery will be equal.