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Hello, I added a few mods to my hexxit customized modpack I play on privately. All of a sudden, I get this crash, "Description 'Ticking Memory Connection'" Maybe someone who knows more about code than I do, which is not alot, can help me out here.

Here is the error log:

---- Minecraft Crash Report ----
// I let you down. Sorry

Time: 4/29/16 5:49 PM
Description: Ticking memory connection

java.lang.IllegalArgumentException: Duplicate id value for 27!
at net.minecraft.entity.DataWatcher.func_75682_a(SourceFile:64)
at wehavecookies56.kk.core.extendedproperties.EntityPropertyDriveForm.<init>(EntityPropertyDriveForm.java:35)
at wehavecookies56.kk.core.extendedproperties.EntityPropertyDriveForm.register(EntityPropertyDriveForm.java:95)
at wehavecookies56.kk.core.event.EntityConstructEvent.onEntityConstructing(EntityConstructEvent.java:26)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_382_EntityConstructEvent_onEntityConstructing_EntityConstructing.invoke(.dynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140)
at net.minecraft.entity.Entity.<init>(Entity.java:179)
at net.minecraft.entity.EntityLivingBase.<init>(EntityLivingBase.java:119)
at net.minecraft.entity.player.EntityPlayer.<init>(Unknown Source)
at net.minecraft.entity.player.EntityPlayerMP.<init>(EntityPlayerMP.java:138)
at net.minecraft.server.management.ServerConfigurationManager.func_148545_a(ServerConfigurationManager.java:410)
at net.minecraft.server.network.NetHandlerLoginServer.func_147326_c(NetHandlerLoginServer.java:101)
at net.minecraft.server.network.NetHandlerLoginServer.func_147233_a(NetHandlerLoginServer.java:60)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:215)
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:186)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at net.minecraft.entity.DataWatcher.func_75682_a(SourceFile:64)
at wehavecookies56.kk.core.extendedproperties.EntityPropertyDriveForm.<init>(EntityPropertyDriveForm.java:35)
at wehavecookies56.kk.core.extendedproperties.EntityPropertyDriveForm.register(EntityPropertyDriveForm.java:95)
at wehavecookies56.kk.core.event.EntityConstructEvent.onEntityConstructing(EntityConstructEvent.java:26)
at cpw.mods.fml.common.eventhandler.ASMEventHandler_382_EntityConstructEvent_onEntityConstructing_EntityConstructing.invoke(.dynamic)
at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54)
at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140)
at net.minecraft.entity.Entity.<init>(Entity.java:179)
at net.minecraft.entity.EntityLivingBase.<init>(EntityLivingBase.java:119)
at net.minecraft.entity.player.EntityPlayer.<init>(Unknown Source)
at net.minecraft.entity.player.EntityPlayerMP.<init>(EntityPlayerMP.java:138)
at net.minecraft.server.management.ServerConfigurationManager.func_148545_a(ServerConfigurationManager.java:410)
at net.minecraft.server.network.NetHandlerLoginServer.func_147326_c(NetHandlerLoginServer.java:101)
at net.minecraft.server.network.NetHandlerLoginServer.func_147233_a(NetHandlerLoginServer.java:60)
at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:215)

-- Ticking connection --
Details:
Connection: [email protected]
Stacktrace:
at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:186)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685)

-- System Details --
Details:
Minecraft Version: 1.7.10
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 290721608 bytes (277 MB) / 745480192 bytes (710 MB) up to 6429081600 bytes (6131 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx6G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 9, tallocated: 61
FML: MCP v9.05 FML v7.10.99.99 Minecraft Forge 10.13.4.1614 Optifine OptiFine_1.7.10_HD_C1 70 mods loaded, 70 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJAAAA mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
UCHIJAAAA FML{7.10.99.99} [Forge Mod Loader] (forge-1.7.10-10.13.4.1614-1.7.10.jar)
UCHIJAAAA Forge{10.13.4.1614} [Minecraft Forge] (forge-1.7.10-10.13.4.1614-1.7.10.jar)
UCHIJAAAA bettersleepingcore{1.0} [Better Sleeping Core] (minecraft.jar)
UCHIJAAAA CodeChickenCore{1.0.7.47} [CodeChicken Core] (minecraft.jar)
UCHIJAAAA NotEnoughItems{1.0.5.118} [Not Enough Items] (NotEnoughItems-1.7.10-1.0.5.118-universal.jar)
UCHIJAAAA RenderPlayerAPI{1.4} [Render Player API] (minecraft.jar)
UCHIJAAAA <CoFH ASM>{000} [CoFH ASM] (minecraft.jar)
UCHIJAAAA battlegear2{1.7.10} [Mine & Blade Battlegear 2 - Bullseye] (1.7.10-MB_Battlegear2-Bullseye-1.0.8.3.jar)
UCHIJAAAA bspkrsCore{6.15} [bspkrsCore] ([1.7.10]bspkrsCore-universal-6.15.jar)
UCHIJAAAA FloatingRuins{1.7.10.r02} [FloatingRuins] ([1.7.10]FloatingRuins-universal-1.7.10.r02.jar)
UCHIJAAAA Treecapitator{1.7.10} [Treecapitator] ([1.7.10]Treecapitator-universal-2.0.4.jar)
UCHIJAAAA CoFHCore{1.7.10R3.1.2} [CoFH Core] (CoFHCore-[1.7.10]3.1.2-325.jar)
UCHIJAAAA Artifice{1.7.10R1.1.4} [Artifice] (Artifice-1.7.10-1.1.5R-399.jar)
UCHIJAAAA Backpack{2.0.1} [Backpack] (backpack-2.0.1-1.7.x.jar)
UCHIJAAAA BattleTowers{1.5.1} [Battle Towers] (BattleTowers-1.7.10.jar)
UCHIJAAAA bettersleeping{1.7.10-1.2.27} [Better Sleeping] (BetterSleeping-1.7.10-1.2.27.jar)
UCHIJAAAA betterstorage{0.13.1.126} [BetterStorage] (BetterStorage-1.7.10-0.13.1.126.jar)
UCHIJAAAA BiblioCraft{1.11.4} [BiblioCraft] (BiblioCraft[v1.11.4][MC1.7.10].jar)
UCHIJAAAA CarpentersBlocks{3.3.7} [Carpenter's Blocks] (Carpenter's Blocks v3.3.7 - MC 1.7.10.jar)
UCHIJAAAA ChestTransporter{2.0.3} [Chest Transporter] (ChestTransporter-2.0.3-MC1.7.10.jar)
UCHIJAAAA chococraft{4.1.5} [Clienthax's ChocoCraft] (ChocoCraft-4.1.5.jar)
UCHIJAAAA chocolateQuest{1.0} [Chocolate Quest] (chocolateQuest-1.7.10-1.0.jar)
UCHIJAAAA dsurround{1.0.3.2} [Dynamic Surroundings] (Dynamic-Surroundings-Mod-1.7.10.jar)
UCHIJAAAA eplus{3.0.2-d} [Enchanting Plus] (EnchantingPlus-1.7.10-3.0.2-d.jar)
UCHIJAAAA endercrop{1.0} [Ender Crop] (Ender-Crop-Mod-1.7.10.jar)
UCHIJAAAA weaponmod{v1.14.3} [Balkon's WeaponMod] (weaponmod-1.14.3.jar)
UCHIJAAAA exparmory{1.4.1} [Expanded Armory] (ExpandedArmory-1.7.10-1.4.1.jar)
UCHIJAAAA ExtrabiomesXL{3.16.4} [ExtrabiomesXL] (extrabiomesxl_1.7.10-3.16.4.jar)
UCHIJAAAA Mantle{1.7.10-0.3.2.jenkins191} [Mantle] (Mantle-1.7.10-0.3.2b.jar)
UCHIJAAAA Natura{2.2.0} [Natura] (natura-1.7.10-2.2.0.1.jar)
UCHIJAAAA Waila{1.5.10} [Waila] (Waila-1.5.10_1.7.10.jar)
UCHIJAAAA TConstruct{1.7.10-1.8.8.build988} [Tinkers' Construct] (TConstruct-1.7.10-1.8.8.jar)
UCHIJAAAA ExtraTiC{1.4.5} [ExtraTiC] (ExtraTiC-1.7.10-1.4.5.jar)
UCHIJAAAA ftfloocraft{1.7.10-0.3.1} [Floocraft] (Floocraft-Mod-1.7.10.jar)
UCHIJAAAA healthindicator{1.0} [Health Indicator] (Health Indicators-1.0.jar)
UCHIJAAAA IGWMod{1.1.0-13} [In-Game wiki Mod] (In-Game-Wiki-Mod-1.7.10.jar)
UCHIJAAAA InfernalMobs{1.6.0} [Infernal Mobs] (InfernalMobs-1.7.10.jar)
UCHIJAAAA infernalskycolor{0.8} [Infernal Sky Color] (InfernalSkyColor-0.8.jar)
UCHIJAAAA inventorytweaks{1.59-dev-152-cf6e263} [Inventory Tweaks] (InventoryTweaks-1.59-dev-152.jar)
UCHIJAAAA JABBA{1.2.1} [JABBA] (Jabba-1.2.1a_1.7.10.jar)
UCHIJAAAA KeepingInventory{1.6} [Keeping Inventory] (Keeping-Inventory-Mod-1.7.10.jar)
UCHIJAAAA kk{0.7.0.1.7.10} [Kingdom Keys] (Kingdom-Keys-Mod-1.7.10.jar)
UCHIJAAAA mesa{1.7.10-R2} [Movement Enhancement Suits and Armor] (MESA-1.7.10-R2.jar)
UCHIJAAAA meteors{2.14.3} [Falling Meteors] (meteors-1.7.10-2.14.3.jar)
UCHIJAAAA moreores{3.0.2,} [Mr.Robertman's More Ores] (More Ores V3.0.2 (MC 1.7.10).jar)
UCHIJAAAA MoreFurnaces{1.3.9} [More Furnaces] (More-Furnaces-Mod-1.7.10.jar)
UCHIJAAAA MultiPageChest{1.3.2} [Multi Page Chest] (MultiPageChest-1.3.2-MC1.7.10.jar)
UCHIJAAAA NEIAddons{1.12.14.40} [NEI Addons] (neiaddons-1.12.14.40-mc1.7.10.jar)
UCHIJAAAA NEIAddons|Developer{1.12.14.40} [NEI Addons: Developer Tools] (neiaddons-1.12.14.40-mc1.7.10.jar)
UCHIJAAAA NEIAddons|AppEng{1.12.14.40} [NEI Addons: Applied Energistics 2] (neiaddons-1.12.14.40-mc1.7.10.jar)
UCHIJAAAA NEIAddons|Botany{1.12.14.40} [NEI Addons: Botany] (neiaddons-1.12.14.40-mc1.7.10.jar)
UCHIJAAAA NEIAddons|Forestry{1.12.14.40} [NEI Addons: Forestry] (neiaddons-1.12.14.40-mc1.7.10.jar)
UCHIJAAAA NEIAddons|CraftingTables{1.12.14.40} [NEI Addons: Crafting Tables] (neiaddons-1.12.14.40-mc1.7.10.jar)
UCHIJAAAA NEIAddons|ExNihilo{1.12.14.40} [NEI Addons: Ex Nihilo] (neiaddons-1.12.14.40-mc1.7.10.jar)
UCHIJAAAA neiintegration{1.1.2} [NEI Integration] (NEIIntegration-MC1.7.10-1.1.2.jar)
UCHIJAAAA ObsidianBoat{v1.3.2} [Obsidian Boat] (ObsidianBoat-1.7.10-1.3.2.jar)
UCHIJAAAA ObsidiPlates{3.0.0.18} [ObsidiPlates] (ObsidiPlates-1.7.10-universal-3.0.0.18.jar)
UCHIJAAAA Oceancraft{1.4.1} [Oceancraft] (OceanCraft-Mod-1.7.10.jar)
UCHIJAAAA RTG{0.7.0} [Realistic Terrain Generation] (Realistic-Terrain-Generation-Mod-1.7.10.jar)
UCHIJAAAA RottenFleshToLeather{1.7.10-2.0} [Rotten Flesh to Leather] (RottenFleshToLeather-2.1-1.7.10.jar)
UCHIJAAAA AS_Ruins{15.4} [Ruins Spawning System] (Ruins-1.7.10.jar)
UCHIJAAAA secretroomsmod{@[email protected]} [The SecretRoomsMod] (secretroomsmod-1.7.2-4.6.3.345.jar)
UCHIJAAAA TiCTooltips{1.2.5} [TiC Tooltips] (TiCTooltips-mc1.7.10-1.2.5.jar)
UCHIJAAAA tinkersdefense{1.2} [Tinkers' Defense] (Tinkers-Defense-1.2.1.jar)
UCHIJAAAA TMechworks{0.2.15.106} [Tinkers' Mechworks] (TMechworks-1.7.10-0.2.15.106.jar)
UCHIJAAAA TwilightForest{2.3.7} [The Twilight Forest] (twilightforest-1.7.10-2.3.7.jar)
UCHIJAAAA voxelmap{1.7.10} [VoxelMap No Radar] (VoxelMap-No-Radar-Mod-1.7.10.jar)
UCHIJAAAA WTP{1.7.10-1.0.29} [What's This Pack] (WTP-1.7.10-1.0.29.1.jar)
UCHIJAAAA IguanaTweaksTConstruct{1.7.10-2.1.6.163} [Iguana Tinker Tweaks] (IguanaTinkerTweaks-1.7.10-2.1.6.jar)
GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread.
CoFHCore: -[1.7.10]3.1.2-325
Mantle Environment: DO NOT REPORT THIS CRASH! Unsupported mods in environment: optifine
TConstruct Environment: Environment healthy.
Profiler Position: N/A (disabled)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 0 / 8; []
Type: Integrated Server (map_client.txt)
Is Modded: Definitely; Client brand changed to 'fml,forge'

what two items are using the same id? and also thank you for answering

Oh sorry everyone, more furnaces was messing with another mod, but thank you.