What is your Quests version / build number (do not say "latest")?
5.1.2-b501
Describe the problem and how to replicate it.
The process is quite the same as #2278, but mine requires a player to craft the item first and then deliver it to the NPC. Yes, it deducts the same amount of item as it should be, however, if you kept giving the NPC the same item, it increases the way it should not.
I'm unsure if this might help, but it came from CMILib every time the duplication was performed.
[13:12:00 WARN]: java.lang.reflect.InvocationTargetException
[13:12:00 WARN]: at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:118)
[13:12:00 WARN]: at java.base/java.lang.reflect.Method.invoke(Method.java:580)
[13:12:00 WARN]: at CMILib1.5.1.1.jar//net.Zrips.CMILib.NBT.CMINBT.getNbt(CMINBT.java:1519)
[13:12:00 WARN]: at CMILib1.5.1.1.jar//net.Zrips.CMILib.NBT.CMINBT.<init>(CMINBT.java:348)
[13:12:00 WARN]: at CMILib1.5.1.1.jar//net.Zrips.CMILib.GUI.GUIListener.onItemDrop(GUIListener.java:121)
[13:12:00 WARN]: at com.destroystokyo.paper.event.executor.asm.generated.GeneratedEventExecutor90.execute(Unknown Source)
[13:12:00 WARN]: at org.bukkit.plugin.EventExecutor$2.execute(EventExecutor.java:77)
[13:12:00 WARN]: at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:80)
[13:12:00 WARN]: at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70)
[13:12:00 WARN]: at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54)
[13:12:00 WARN]: at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:131)
[13:12:00 WARN]: at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:630)
[13:12:00 WARN]: at net.minecraft.world.entity.player.Player.drop(Player.java:832)
[13:12:00 WARN]: at net.minecraft.server.level.ServerPlayer.drop(ServerPlayer.java:2697)
[13:12:00 WARN]: at net.minecraft.server.level.ServerPlayer.drop(ServerPlayer.java:2692)
[13:12:00 WARN]: at net.minecraft.server.level.ServerPlayer.drop(ServerPlayer.java:2789)
[13:12:00 WARN]: at net.minecraft.server.network.ServerGamePacketListenerImpl.handlePlayerAction(ServerGamePacketListenerImpl.java:1910)
[13:12:00 WARN]: at net.minecraft.network.protocol.game.ServerboundPlayerActionPacket.handle(ServerboundPlayerActionPacket.java:51)
[13:12:00 WARN]: at net.minecraft.network.protocol.game.ServerboundPlayerActionPacket.handle(ServerboundPlayerActionPacket.java:20)
[13:12:00 WARN]: at net.minecraft.network.protocol.PacketUtils.lambda$ensureRunningOnSameThread$0(PacketUtils.java:56)
[13:12:00 WARN]: at net.minecraft.server.TickTask.run(TickTask.java:18)
[13:12:00 WARN]: at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:151)
[13:12:00 WARN]: at net.minecraft.util.thread.ReentrantBlockableEventLoop.doRunTask(ReentrantBlockableEventLoop.java:24)
[13:12:00 WARN]: at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:1574)
[13:12:00 WARN]: at net.minecraft.server.MinecraftServer.doRunTask(MinecraftServer.java:201)
[13:12:00 WARN]: at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:125)
[13:12:00 WARN]: at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:1551)
[13:12:00 WARN]: at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:1544)
[13:12:00 WARN]: at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:135)
[13:12:00 WARN]: at net.minecraft.server.MinecraftServer.managedBlock(MinecraftServer.java:1503)
[13:12:00 WARN]: at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:1510)
[13:12:00 WARN]: at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1355)
[13:12:00 WARN]: at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:334)
[13:12:00 WARN]: at java.base/java.lang.Thread.run(Thread.java:1583)
[13:12:00 WARN]: Caused by: java.lang.IllegalStateException: Value must be within range [1;99]: 288
[13:12:00 WARN]: at com.mojang.serialization.DataResult$Error.getOrThrow(DataResult.java:287)
[13:12:00 WARN]: at com.mojang.serialization.DataResult.getOrThrow(DataResult.java:81)
[13:12:00 WARN]: at net.minecraft.world.item.ItemStack.save(ItemStack.java:624)
[13:12:00 WARN]: at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
[13:12:00 WARN]: ... 33 more
If applicable, can you provide an example quest from quests.yml?
@EurusTheGreat Thanks for reporting this. As you discovered, this bug requires a particular objective setup to replicate. Please give the following development build a try:
What is your Quests version / build number (do not say "latest")?
5.1.2-b501
Describe the problem and how to replicate it.
The process is quite the same as #2278, but mine requires a player to craft the item first and then deliver it to the NPC. Yes, it deducts the same amount of item as it should be, however, if you kept giving the NPC the same item, it increases the way it should not.
Here's a video showing the duplication bug: https://www.youtube.com/watch?v=8eq85oklgek
Any console errors to share?
If applicable, can you provide an example quest from quests.yml?