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java.lang.NullPointerException: Ticking entity	at net.minecraft.potion.PotionEffect.deincrementDuration(PotionEffect.java:152)	at net.minecraft.potion.PotionEffect.onUpdate(PotionEffect.java:142)	at net.minecraft.entity.EntityLivingBase.updatePotionEffects(EntityLivingBase.java:627)	at net.minecraft.entity.EntityLivingBase.onEntityUpdate(EntityLivingBase.java:376)	at net.minecraft.entity.EntityLiving.onEntityUpdate(EntityLiving.java:201)	at net.minecraft.entity.Entity.onUpdate(Entity.java:398)	at net.minecraft.entity.EntityLivingBase.onUpdate(EntityLivingBase.java:1795)	at net.minecraft.entity.EntityLiving.onUpdate(EntityLiving.java:278)	at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:1884)	at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:740)	at net.minecraft.world.World.updateEntity(World.java:1853)	at net.minecraft.world.World.updateEntities(World.java:1702)	at net.minecraft.world.WorldServer.updateEntities(WorldServer.java:572)	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:783)	at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:683)	at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:193)	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:566)	at java.lang.Thread.run(Thread.java:745)