Key already existed in dictionary error

[Former user]

Just got this after making a new MAME list with Lightspeed.

System.ArgumentException: The key already existed in the dictionary. at System.Collections.Concurrent.ConcurrentDictionary`2.System.Collections.Generic.IDictionary<TKey,TValue>.Add(TKey key, TValue value) at (DataManager , Boolean ) at LaunchBox.Data.DataManager.Load(Boolean settingsOnly) at LaunchBox.Data.DataManager..ctor(Boolean bare, Boolean settingsOnly) at (String[] ) at LaunchBox.Program.Main(String[] args)

[Kirsten Marie]

Thank you so much for letting us know! We greatly appreciate it! It will be checked out as soon as possible!

[Jason Carr]

Hi anonymous, please report this issue in the Lightspeed thread. It looks like Lightspeed added a duplicate platform here which caused the problem.