Modder Ur Item IDs are wrong!
Are they? Well then please go tell Studio Wildcard they need to add an Additional Items Array. Or not release any content updates to the game without updating the Ark Dev Kit.

Item IDs are completely automatic.
Item IDs are completely tied to the Master Item List of a mod.
Item IDs are not fixable unless the ADK has the *NEW* Items in it.

This will be copy pasterinoed from now on, have a nice day =]