ArgumentException at ExportLootSpawnSolved

So i verified my config and it's valid. Used better loot with FD and all worked well. Any tips? Tnx in advance! 

Exception while calling NextTick callback (ArgumentException: An item with the same key has already been added. Key: GunRoll_Sub_Medium)
at System.Collections.Generic.Dictionary`2[TKey,TValue].TryInsert (TKey key, TValue value, System.Collections.Generic.InsertionBehavior behavior) [0x000c1] in <fb001e01371b4adca20013e0ac763896>:0
at System.Collections.Generic.Dictionary`2[TKey,TValue].Add (TKey key, TValue value) [0x00000] in <fb001e01371b4adca20013e0ac763896>:0
at Oxide.Plugins.FancyDrop.ExportLootSpawn (Oxide.Plugins.FancyDrop+ExportData expData, LootSpawn lootSpawn, System.Int32 level) [0x000c1] in <24480caf13f041dca8965bc4e55cbb0a>:0
at Oxide.Plugins.FancyDrop.ExportLootSpawn (Oxide.Plugins.FancyDrop+ExportData expData, LootSpawn lootSpawn, System.Int32 level) [0x000ce] in <24480caf13f041dca8965bc4e55cbb0a>:0
at Oxide.Plugins.FancyDrop.SetupLoot () [0x000a7] in <24480caf13f041dca8965bc4e55cbb0a>:0
at Oxide.Plugins.FancyDrop.<OnServerInitialized>m__0 () [0x00000] in <24480caf13f041dca8965bc4e55cbb0a>:0
at Oxide.Core.OxideMod.OnFrame (System.Single delta) [0x00051] in <ec05e0208c9149bba43236ca58fea105>:0
Me too. I installed it today.
Run your Config and Data files thru the json validator.
That is not the problem. In the end I solved it and it was because of the Better Loot. You must activate from there.

Already did that. Using BetterLoot with it and everything checks out.

California
That is not the problem. In the end I solved it and it was because of the Better Loot. You must activate from there.

How did you manage to solve it? I've been looking into both configs and can't find anything..

SpaceVain

Already did that. Using BetterLoot with it and everything checks out.

I think I remember marking this true in Better Loot and reloading the plugin obviously

Nope,not working. I don't even have that option in better loot cfg. And most important data/FancyDrop file is empty. Still havent solved the issue.
In config/betterloot.json it should show what appears in the image. And i also have empty fancy drop data file.
Same problem for me. I tried with and without BetterLoot. I have added the SupplyDrop section to BetterLoot config file, but does not change the problem.
Exception while calling NextTick callback (ArgumentException: An item with the same key has already been added. Key: GunRoll_Sub_Medium)
at System.Collections.Generic.Dictionary`2[TKey,TValue].TryInsert (TKey key, TValue value, System.Collections.Generic.InsertionBehavior behavior) [0x000c1] in <fb001e01371b4adca20013e0ac763896>:0 0b/s in, 0b/s out
at System.Collections.Generic.Dictionary`2[TKey,TValue].Add (TKey key, TValue value) [0x00000] in <fb001e01371b4adca20013e0ac763896>:0
at Oxide.Plugins.FancyDrop.ExportLootSpawn (Oxide.Plugins.FancyDrop+ExportData expData, LootSpawn lootSpawn, System.Int32 level) [0x000c1] in <8f943975fff345dba029c579e5b5588c>:0
at Oxide.Plugins.FancyDrop.ExportLootSpawn (Oxide.Plugins.FancyDrop+ExportData expData, LootSpawn lootSpawn, System.Int32 level) [0x000ce] in <8f943975fff345dba029c579e5b5588c>:0
at Oxide.Plugins.FancyDrop.SetupLoot () [0x000a7] in <8f943975fff345dba029c579e5b5588c>:0
at Oxide.Plugins.FancyDrop.<OnServerInitialized>m__0 () [0x00000] in <8f943975fff345dba029c579e5b5588c>:0
at Oxide.Core.OxideMod.OnFrame (System.Single delta) [0x00051] in <ec05e0208c9149bba43236ca58fea105>:0

This is with the stock standard FancyDrop.json settings file? Any idea what's causing that? I am using BetterLoot.

Run your config thru the json validator
Hello,
I have same error
18:37 [Error] Exception while calling NextTick callback (ArgumentException: An item with the same key has already been added. Key: GunRoll_Sub_Medium)
  at System.Collections.Generic.Dictionary`2[TKey,TValue].TryInsert (TKey key, TValue value, System.Collections.Generic.InsertionBehavior behavior) [0x000c1] in <fb001e01371b4adca20013e0ac763896>:0 
  at System.Collections.Generic.Dictionary`2[TKey,TValue].Add (TKey key, TValue value) [0x00000] in <fb001e01371b4adca20013e0ac763896>:0 
  at Oxide.Plugins.FancyDrop.ExportLootSpawn (Oxide.Plugins.FancyDrop+ExportData expData, LootSpawn lootSpawn, System.Int32 level) [0x000c1] in <7042f9e61e5345bb8d764c5c85d7397d>:0 
  at Oxide.Plugins.FancyDrop.ExportLootSpawn (Oxide.Plugins.FancyDrop+ExportData expData, LootSpawn lootSpawn, System.Int32 level) [0x000ce] in <7042f9e61e5345bb8d764c5c85d7397d>:0 
  at Oxide.Plugins.FancyDrop.SetupLoot () [0x000a7] in <7042f9e61e5345bb8d764c5c85d7397d>:0 
  at Oxide.Plugins.FancyDrop.<OnServerInitialized>m__0 () [0x00000] in <7042f9e61e5345bb8d764c5c85d7397d>:0 
  at Oxide.Core.OxideMod.OnFrame (System.Single delta) [0x00051] in <ec05e0208c9149bba43236ca58fea105>:0 ​
Same issue...
Did you run your config thru the json validator? as the error states the same key. Or your Better Loot config or data file?

Merged post

I am literally running with no issues on all my servers, granted I use Better Loot to hand all the Supply Drop loot. 
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