Replica of spider missing inventory item component

This error has crashed my Starving Floor server three times now and it seems that it is not Starving Floor that is causing it. Please tell me if it is rather a mod I use tht is causing it. Here is the log of a recent crash:

[string "scripts/components/inventoryitem.lua"]:10: attempt to index field 'inventoryitem' (a nil value)
LUA ERROR stack traceback:
scripts/components/inventoryitem.lua:10 in (field) ? (Lua) <9-11>
self =
isnew = false
nobounce = true
ondropfn = function - scripts/standardcomponents.lua:621
pushlandedevents = true
sinks = false
canbepickedupalive = true
is_landed = false
trappable = true
inst = 122340 - spider(LIMBO) (valid:false)
keepondeath = false
droprandomdir = false
_ = table: 0x36dc7220
   onputininventoryfn = function - scripts/standardcomponents.lua:614
owner = nil
scripts/class.lua:30 in () ? (Lua) <23-32>
t = table: 0x2ffc3c30
k = owner
v = nil
p = table: 0x25fb72e0
old = 119984 - webber (valid:true)
scripts/components/inventoryitem.lua:131 in (method) ClearOwner (Lua) <130-132>
self =
isnew = false
nobounce = true
ondropfn = function - scripts/standardcomponents.lua:621
pushlandedevents = true
sinks = false
 canbepickedupalive = true
is_landed = false
trappable = true
inst = 122340 - spider(LIMBO) (valid:false)
keepondeath = false
droprandomdir = false
_ = table: 0x36dc7220
onputininventoryfn = function - scripts/standardcomponents.lua:614
owner = nil
scripts/components/inventoryitem.lua:207 in (method) OnRemoved (Lua) <203-210>
self =
isnew = false
nobounce = true
ondropfn = function - scripts/standardcomponents.lua:621
pushlandedevents = true
 sinks = false
canbepickedupalive = true
is_landed = false
trappable = true
inst = 122340 - spider(LIMBO) (valid:false)
keepondeath = false
droprandomdir = false
_ = table: 0x36dc7220
onputininventoryfn = function - scripts/standardcomponents.lua:614
scripts/components/inventory.lua:979 in () ? (Lua) <960-1007>
self =
DropItem = function - ../mods/workshop-1952248433/modmain.lua:506
ignoreoverflow = false
dropondeath = false
isvisible = true
 ConsumeItemsByFn = function - ../mods/workshop-1418878027/scripts/gf_init_components.lua:95
ignoresound = false
isopen = true
ignorefull = false
inst = 119984 - webber (valid:true)
equipslots = table: 0x2e6a7a60
opencontainers = table: 0x3671b6e0
silentfull = false
itemslots = table: 0x31780100
_ = table: 0x2c270c60
item = 122340 - spider(LIMBO) (valid:false)
wholestack = false
prevslot = 1
k = 1
v = 122340 - spider(LIMBO) (valid:false)
=(tail call):-1 in () (tail) <-1--1>
scripts/components/inventory.lua:490 in (upvalue) old_DropItem (Lua) <485-510>
self =
DropItem = function - ../mods/workshop-1952248433/modmain.lua:506
ignoreoverflow = false
dropondeath = false
isvisible = true
ConsumeItemsByFn = function - ../mods/workshop-1418878027/scripts/gf_init_components.lua:95
ignoresound = false
isopen = true
ignorefull = false
inst = 119984 - webber (valid:true)
equipslots = table: 0x2e6a7a60
opencontainers = table: 0x3671b6e0
silentfull = false
 itemslots = table: 0x31780100
_ = table: 0x2c270c60
item = 122340 - spider(LIMBO) (valid:false)
wholestack = false
randomdir = (0.91, 0.00, 0.42)
pos = nil
../mods/workshop-1952248433/modmain.lua:507 in (method) DropItem (Lua) <506-517>
self =
DropItem = function - ../mods/workshop-1952248433/modmain.lua:506
ignoreoverflow = false
dropondeath = false
isvisible = true
ConsumeItemsByFn = function - ../mods/workshop-1418878027/scripts/gf_init_components.lua:95
ignoresound = false
isopen = true
 ignorefull = false
inst = 119984 - webber (valid:true)
equipslots = table: 0x2e6a7a60
opencontainers = table: 0x3671b6e0
silentfull = false
itemslots = table: 0x31780100
_ = table: 0x2c270c60
item = 122340 - spider(LIMBO) (valid:false)
wholestack = fal
[string "scripts/components/inventoryitem.lua"]:10: attempt to index field 'inventoryitem' (a nil value)
LUA ERROR stack traceback:
scripts/components/inventoryitem.lua:10 in (field) ? (Lua) <9-11>
scripts/class.lua:30 in () ? (Lua) <23-32>
scripts/components/inventoryitem.lua:131 in (method) ClearOwner (Lua) <130-132>
scripts/components/inventoryitem.lua:207 in (method) OnRemoved (Lua) <203-210>
scripts/components/inventory.lua:979 in () ? (Lua) <960-1007>
=(tail call):-1 in () (tail) <-1--1>
scripts/components/inventory.lua:490 in (upvalue) old_DropItem (Lua) <485-510>
../mods/workshop-1952248433/modmain.lua:507 in (method) DropItem (Lua) <506-517>
scripts/components/thief.lua:21 in (method) StealItem (Lua) <11-42>
scripts/prefabs/frog.lua:42 in (field) onhitotherfn (Lua) <41-43>
scripts/components/combat.lua:506 in (upvalue) _oldGetAttacked (Lua) <433-518>
../mods/workshop-1418878027/scripts/gf_init_components.lua:39 in (method) GetAttacked (Lua) <38-45>
scripts/components/combat.lua:921 in () ? (Lua) <858-945>
=(tail call):-1 in () (tail) <-1--1>
scripts/stategraphs/SGfrog.lua:168 in (field) fn (Lua) <168-168>
scripts/stategraph.lua:572 in (method) UpdateState (Lua) <540-584>
scripts/stategraph.lua:611 in (method) Update (Lua) <603-631>
scripts/stategraph.lua:128 in (method) Update (Lua) <109-153>
scripts/update.lua:233 in () ? (Lua) <164-243>