I put the core and the mod into the mods folder then i load up minecraft and it crashes saying "java.lang.IllegalArgumentException: Slot 3352 is already occupied by micdoodle8.mods.galacticraft.core.blocks.GCCoreBlockLandingPad@6449194c when adding micdoodle8.mods.galacticraft.core.blocks.GCCoreBlockLandingPadFull@7b1c0003" Please help!