Familiar's required attribute changed after exchange attribute

In addition to a description of the bug you are reporting, please provide:

Device Type:PC
Device Model:-
Device Operating System:windows
Diablo Immortal App Version:latest

My quakestrider had 2 legendary traits(requires 170 ferocity).
So, I bought other legendary quakestrider(upper 170 ferocity) in market, and exchange attribute.
→ 2 legendary traits changed to requires 170 resilience.