You have to understand how the objects work. m_pp basically is the player profile that's what we read back when we log in to get our bearings and what we save() to. But most the time the client/npc tracks it's own data without referencing the player profile. Without that line you wouldn't be that level for things like spell and combat calculations until you zoned because the active client object still thinks your level is the one it got from pp originally.
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