Stacks broken after last server update!!

After the last server update 4 hours ago I did my daily restart and after the server started all stack sizes went back to Vanilla. I think this update must have broke something? No errors in the console and I have attached my config.

It looks like a key is missing

StackModifier was compiled successfully in 1608ms
Unloaded plugin Stack Modifier v2.9.96 by Khan
[Stack Modifier] Automatically Harmony patched 'Item.OnBroken_Patch1' method. (Item_Patch)
[Stack Modifier] Automatically Harmony patched 'BaseMelee.CLProject_Patch1' method. (BaseMelee_Patch)
[Stack Modifier] Automatically Harmony patched 'ItemModConsumeContents.DoAction_Patch1' method. (ItemModConsumeContents_DoAction_Patch)
[Stack Modifier] Automatically Harmony patched 'Item.MoveToContainer_Patch1' method. (Item_MoveToContainer_Patch)
[Stack Modifier] Automatically Harmony patched 'Planner.DoPlacement_Patch1' method. (Planner_DoPlacement_Patch)
[Stack Modifier] Automatically Harmony patched 'RepairBench.RepairItem_Patch1' method. (RepairBench_RepairItem_Patch)
[Stack Modifier] Automatically Harmony patched 'Item.CanStack_Patch2' method. (Item_CanStack_Patch)
[Stack Modifier] Automatically Harmony patched 'DroppedItem.OnDroppedOn_Patch2' method. (DroppedItem_OnDroppedOn_Patch)
[Stack Modifier] Automatically Harmony patched 'Item.SplitItem_Patch2' method. (Item_SplitItem_Patch)
[Stack Modifier] Automatically Harmony patched 'PlayerInventory.MoveItem_Patch1' method. (PlayerInventory_MoveItem_Patch)
[Stack Modifier] Checking For Discrepancies With Game Items
[Stack Modifier] 16%
Loaded plugin Stack Modifier v2.9.96 by Khan
[Stack Modifier] 66%
[Stack Modifier] Default Item's are missing! Notify DEV! Create Support Ticket!:
Gems_-1622386500_kickgems_5000
[Stack Modifier] 100%
[Stack Modifier] Modifying Stacks
KeyNotFoundException: The given key '-1622386500' was not present in the dictionary.

Changed Status from Pending to Fixed

Changed Fixed In to 2.9.97