LogPredictionKey: Warning: UnAck'd PredictionKey 2532 in DelegateMap while OnRep [3336/0]. This indicates keychains are created w/o being sent to & ack'd by the server. Last ack'd key in that slot was [0/0].

[DiaricaGameDev]

Encountered those warning logs before I update engine and project to UE5.4

In Gameplay Ability System
Everytime I tried to activate a gameplay ability, those logs may appear.

[OddOculus]

This is solved in Unreal 5.4.2 which you can pull right now if you’re building from source. Credit to @CodingJodon for answering this question in the Unreal Source #gameplay-ability-system channel.

[DiaricaGameDev]

Those are the commits that caused this issue.
Just a misuse of Warning Log

CommitName : Gameplay FPredictionKey Fixes