BigDig server crash help (ubuntu server)

[mw3lab]

When the server starts it always crashes and i get this report.

-- Minecraft Crash Report ----
// Ouch. That hurt

Time: 6/24/15 3:51 AM
Description: Exception in server tick loop

java.lang.IllegalArgumentException: Slot 1506 is already occupied by shukaro.artifice.block.decorative.BlockStairsArtifice@29fd2f12 when adding mekanism.common.BlockBasic@2d1d5c47
    at net.minecraft.block.Block.<init>(Block.java:340)
    at mekanism.common.BlockBasic.<init>(BlockBasic.java:48)
    at mekanism.common.Mekanism.addBlocks(Mekanism.java:612)
    at mekanism.common.Mekanism.init(Mekanism.java:1073)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:494)
    at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
    at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
    at com.google.common.eventbus.EventBus.post(EventBus.java:267)
    at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:165)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
    at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
    at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
    at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
    at com.google.common.eventbus.EventBus.post(EventBus.java:267)
    at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:98)
    at cpw.mods.fml.common.Loader.initializeMods(Loader.java:690)
    at cpw.mods.fml.server.FMLServerHandler.finishServerLoading(FMLServerHandler.java:93)
    at cpw.mods.fml.common.FMLCommonHandler.onServerStarted(FMLCommonHandler.java:355)
    at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:141)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:430)
    at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:573)

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

-- System Details --
Details:
    Minecraft Version: 1.5.2
    Operating System: Linux (amd64) version 3.13.0-55-generic
    Java Version: 1.7.0_79, Oracle Corporation
    Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 1927594872 bytes (1838 MB) / 2390753280 bytes (2280 MB) up to 2863661056 bytes (2731 MB)
    JVM Flags: 2 total; -Xmx3G -Xms2G
    AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    Suspicious classes: FML and Forge are installed
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP v7.51 FML v5.2.12.710 Minecraft Forge 7.8.0.710 87 mods loaded, 87 mods active
    mcp{7.44} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized->Initialized
    FML{5.2.12.710} [Forge Mod Loader] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
    Forge{7.8.0.710} [Minecraft Forge] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
    CoFHCore{1.5.2.2} [CoFH Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
    CodeChickenCore{0.8.6.8} [CodeChicken Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
    NotEnoughItems{1.5.2.15} [Not Enough Items] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
    PowerCrystalsCore{1.1.6} [PowerCrystals Core] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
    ImmibisMicroblocks{55.0.1} [Immibis's Microblocks] (coremods) Unloaded->Constructed->Pre-initialized->Initialized
    mod_bspkrsCore{v2.04(1.5.2)} [bspkrsCore] ([1.5.2]bspkrsCorev2.04.zip) Unloaded->Constructed->Pre-initialized->Initialized
    CoFHNetwork{1.5.2.2} [CoFHNetwork] (CoFHCore-1.5.2.2.jar) Unloaded->Constructed->Pre-initialized->Initialized
    CoFHWorld{1.5.2.2} [CoFHWorld] (CoFHCore-1.5.2.2.jar) Unloaded->Constructed->Pre-initialized->Initialized
    GalacticraftCore{0.1.35} [Galacticraft Core] (Galacticraft-1.5.2-a0.1.35.261.jar) Unloaded->Constructed->Pre-initialized->Initialized
    TreeCapitator{Forge 1.5.2.r01} [TreeCapitator] ([1.5.2]TreeCapitator.Forge.1.5.2.r01.Uni.CoreMod.jar) Unloaded->Constructed->Pre-initialized->Initialized
    ImmibisMicroblocksInstallCheck{55.0.1} [Immibis's Microblocks (Check for incorrect installation)] (immibis-microblocks-55.0.1.jar) Unloaded->Constructed->Pre-initialized->Initialized
    BuildCraft|Core{3.5.3} [BuildCraft] (buildcraft-A-3.5.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
    BuildCraft|Factory{3.5.3} [BC Factory] (buildcraft-A-3.5.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
    BuildCraft|Transport{3.5.3} [BC Transport] (buildcraft-A-3.5.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
    BuildCraft|Silicon{3.5.3} [BC Silicon] (buildcraft-A-3.5.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
    APUnofficial{2.3.0} [Additional Pipes] (AdditionalPipes2.3.0-BC3.5.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
    Artifice{1.5.2R1.0} [Artifice] (Artifice-1.0-52.jar) Unloaded->Constructed->Pre-initialized->Initialized
    ArtificeCompat|Vanilla{1.5.2R1.0} [Artifice Compat: Vanilla] (Artifice-1.0-52.jar) Unloaded->Constructed->Pre-initialized->Initialized
    AtomicScience{0.5.2} [Atomic Science] (Atomic_Science_v0.5.2.47.jar) Unloaded->Constructed->Pre-initialized->Initialized
    chococraft{2.8.3} [Torojima's ChocoCraft] (Chococraft_2.8.3.zip) Unloaded->Constructed->Pre-initialized->Initialized
    ComputerCraft{1.53} [ComputerCraft] (ComputerCraft1.53.zip) Unloaded->Constructed->Pre-initialized->Initialized
    CCTurtle{1.53} [ComputerCraft Turtles] (ComputerCraft1.53.zip) Unloaded->Constructed->Pre-initialized->Initialized
    DimensionalDoors{1.5.2R1.3.6RC1} [Dimensional Doors] (DimensionalDoors-1.5.2R1.3.6RC1-71.zip) Unloaded->Constructed->Pre-initialized->Initialized
    DungeonPack{1.5.2 v3} [DungeonPack] (DungeonPack 1.5.2 v3 Universal.zip) Unloaded->Constructed->Pre-initialized->Initialized
    EasyCrafting{1.1.5} [Easy Crafting] (EasyCrafting-1.1.5.jar) Unloaded->Constructed->Pre-initialized->Initialized
    eplus{1.14.6} [Enchanting Plus] (EnchantingPlus-1.14.6.jar) Unloaded->Constructed->Pre-initialized->Initialized
    EnderOre{1.5.2R1.0} [Ender Ore] (EnderOre-1.0-10.jar) Unloaded->Constructed->Pre-initialized->Initialized
    EnderStorage{1.4.2.8} [EnderStorage] (EnderStorage 1.4.2.8.jar) Unloaded->Constructed->Pre-initialized->Initialized
    ICBM|Contraption{1.2.0} [ICBM] (ICBM_Contraption_v1.2.0.108.jar) Unloaded->Constructed->Pre-initialized->Initialized
    ICBM|Sentry{1.2.0} [ICBM] (ICBM_Sentry_v1.2.0.108.jar) Unloaded->Constructed->Pre-initialized->Initialized
    ICBM|Explosion{1.2.0} [ICBM] (ICBM_Explosion_v1.2.0.108.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MFFS{3.0.1} [Modular Force Field System] (MFFS_v3.0.1.121.jar) Unloaded->Constructed->Pre-initialized->Initialized
    Mekanism{5.5.6} [Mekanism] (Mekanism-v5.5.6.63.jar) Unloaded->Constructed->Pre-initialized->Errored
    MekanismGenerators{5.5.6} [MekanismGenerators] (MekanismGenerators-v5.5.6.63.jar) Unloaded->Constructed->Pre-initialized->Errored
    MekanismTools{5.5.6} [MekanismTools] (MekanismTools-v5.5.6.63.jar) Unloaded->Constructed->Pre-initialized->Initialized
    minechem{@VERSION@} [MineChem] (MineChem_v3.x.100.jar) Unloaded->Constructed->Pre-initialized->Initialized
    BuildCraft|Builders{3.5.3} [BC Builders] (buildcraft-A-3.5.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
    BuildCraft|Energy{3.5.3} [BC Energy] (buildcraft-A-3.5.3.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded{1.5.1R2.5.4} [MineFactory Reloaded] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded|CompatAtum{1.5.1R2.5.4} [MFR Compat: Atum] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded|CompatBiomesOPlenty{1.5.1R2.5.4} [MFR Compat: Biomes O' Plenty] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded|CompatChococraft{1.5.1R2.5.4} [MFR Compat: Chococraft] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded|CompatExtraBiomes{1.5.1R2.5.4} [MFR Compat: ExtraBiomes] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded|CompatForestryPre{1.5.1R2.5.4} [MFR Compat: Forestry (2)] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    Forestry{2.2.2.2} [Forestry for Minecraft] (forestry-A-2.2.2.2.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded|CompatForestry{1.5.1R2.5.4} [MFR Compat: Forestry] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded|CompatIC2{1.5.1R2.5.4} [MFR Compat: IC2] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    Magical-Crops{2.0.8a} [Magical Crops - Version 2!] (magical_crops_1.5.1.2.0.8a.zip) Unloaded->Constructed->Pre-initialized->Errored
    MineFactoryReloaded|CompatMagicalCrops{1.5.1R2.5.4} [MFR Compat: Magical Crops] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    Natura{1.5.1_2.0.21} [Natura] (Natura_2.0.21.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded|CompatNatura{1.5.1R2.5.4} [MFR Compat: Natura] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    PamWeeeFlowers{1.1} [Pam's Weee! Flowers] (Pam's Weee Flowers 1.5.1.zip) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded|CompatPams{1.5.1R2.5.4} [MFR Compat: Pam's Mods] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded|CompatRP2{1.5.1R2.5.4} [MFR Compat: RP2] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    SoulShards{1.27} [SoulShards] (SoulShards-v1.27-universal.zip) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded|CompatSoulShards{1.5.1R2.5.4} [MFR Compat: SoulShards] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded|CompatSufficientBiomes{1.5.1R2.5.4} [MFR Compat: Sufficient Biomes] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MFReloaded|CompatThaumcraft{1.5.1R2.5.4} [MFR Compat: Thaumcraft] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    TConstruct{1.5.1_1.3.3.14} [Tinkers' Construct] (TConstruct_1.3.3.15.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded|CompatTConstruct{1.5.1R2.5.4} [MFR Compat: TConstruct] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded|CompatTwilightForest{1.5.1R2.5.4} [MFR Compat: TwilightForest] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded|CompatVanilla{1.5.1R2.5.4} [MFR Compat: Vanilla] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    MineFactoryReloaded|CompatXyCraft{1.5.1R2.5.4} [MFR Compat: XyCraft] (MineFactoryReloaded-2.5.4-665.jar) Unloaded->Constructed->Pre-initialized->Initialized
    NEIPlugins{1.0.8.7} [NEI Plugins] (NEIPlugins-1.0.8.7.jar) Unloaded->Constructed->Pre-initialized->Initialized
    ThermalExpansion{2.4.3.0} [Thermal Expansion] (ThermalExpansion-2.4.3.0.jar) Unloaded->Constructed->Pre-initialized->Initialized
    NetherOres{1.5.1R2.1.3} [Nether Ores] (NetherOres-2.1.3-60.jar) Unloaded->Constructed->Pre-initialized->Initialized
    AppliedEnergistics{rv.10.n} [Applied Energistics] (appeng-rv10-n.zip) Unloaded->Constructed->Pre-initialized->Initialized
    OCS{1.5.2.0} [OpenCCSensors] (OpenCCSensors-1.5.2.0.jar) Unloaded->Constructed->Pre-initialized->Initialized
    OpenPeripheral{0.0.5} [OpenPeripheral] (OpenPeripheral-0.0.5.jar) Unloaded->Constructed->Pre-initialized->Initialized
    rftl{1.0} [RottenFleshToLeather] (RottenFleshToLeather-1.5.1.zip) Unloaded->Constructed->Pre-initialized->Initialized
    secretroomsmod{4.6.0} [SecretRoomsMod] (SecretRoomsMod-universal-4.6.0.281.zip) Unloaded->Constructed->Pre-initialized->Initialized
    UsefulFood{1.4.2} [UsefulFood] (UsefulFood-1.5.1_1.4.2-universal.zip) Unloaded->Constructed->Pre-initialized->Initialized
    BetterStorage{0.6.1.18} [BetterStorage] ([1.5.2]BetterStorage_0.6.1.18.zip) Unloaded->Constructed->Pre-initialized->Initialized
    BetterAnvil{4.1} [Better Anvils] (betterAnvil - 152 - 4.1.zip) Unloaded->Constructed->Pre-initialized->Initialized
    ImmibisCore{55.1.1} [Immibis Core] (immibis-core-55.1.1.jar) Unloaded->Constructed->Pre-initialized->Initialized
    DimensionalAnchors{55.0.0} [Dimensional Anchors] (dimensional-anchor-55.0.0.jar) Unloaded->Constructed->Pre-initialized->Initialized
    EE3{pre1g (build 4)} [Equivalent Exchange 3] (ee3-universal-pre1g.jar) Unloaded->Constructed->Pre-initialized->Initialized
    BinnieCore{1.6-pre8} [Binnie Core] (extra-bees-1.6-pre8.jar) Unloaded->Constructed->Pre-initialized->Initialized
    ExtraBees{1.6-pre8} [Extra Bees] (extra-bees-1.6-pre8.jar) Unloaded->Constructed->Pre-initialized->Initialized
    ImmibisPeripherals{55.0.0} [Immibis's Peripherals] (immibis-peripherals-55.0.0.jar) Unloaded->Constructed->Pre-initialized->Initialized
    IronChest{5.2.6.412} [Iron Chest] (ironchest-universal-1.5.2-5.2.6.412.zip) Unloaded->Constructed->Pre-initialized->Initialized
    ObsidiPlates{1.5.0} [Obsidian Pressure Plates] (obsidiplates-1.5.2-universal-1.5.0.13.jar) Unloaded->Constructed->Pre-initialized->Initialized
    TradeBoothMod{0.4} [Trade Booth Mod] (tradebooth.0.4.zip) Unloaded->Constructed->Pre-initialized->Initialized
    OmniTools{3.1.4.0} [OmniTools] (OmniTools-3.1.4.0.jar) Unloaded->Constructed->Pre-initialized->Initialized
    Profiler Position: N/A (disabled)
    Is Modded: Definitely; Server brand changed to 'fml,forge'
    Type: Dedicated Server (map_server.txt)

 

 

can someone help me understand this?