inventoryitem_replica crashes related to changing a prefabs movespeed multiplier

The crash in question.
 

[02:08:51]: [string "scripts/components/inventoryitem_replica.lu..."]:272: attempt to index field 'classified' (a nil value)

LUA ERROR stack traceback:

scripts/components/inventoryitem_replica.lua:272 in (method) SetWalkSpeedMult (Lua) <260-273>

Line 272 is   self.classified.walkspeedmult:set(x)

Simply putting
 

        if self.classified ~= nil then
    self.classified.walkspeedmult:set(x)
    end

causes the crash to stop happening.

Crash specifically happens when an armor changes its movespeed inside the OnTakeDamage function and the armor you're using breaks. Only on cave enabled servers and only as a client.
 

Do note that this crash is related to a mod, and not vanilla, but the solution is an easy fix I believe.
However, once I sent my friend a version of inventoryitem_replica with the change to line 272
that I showed earlier, their server no longer crashed when the gemstone armor broke.

So I am 100% certain that this fix

Here's a full pastebin.
http://pastebin.com/zxKibVcr