im having issues with my server
[22:51:22.244] [.NET ThreadPool Worker/ERROR] [tML]: Unhandled Exception
System.IO.IOException: The process cannot access the file 'C:\Users\Lumeside\Documents\My Games\Terraria\tModLoader\Worlds\Takuache_Truck_MEET.wld' because it is being used by another process.
at Microsoft.Win32.SafeHandles.SafeFileHandle.CreateFile(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options)
at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize)
at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize)
at System.IO.Strategies.FileStreamHelpers.ChooseStrategy(FileStream fileStream, String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, Int64 preallocationSize)
at System.IO.File.ReadAllBytes(String path)
at Terraria.Utilities.FileUtilities.ReadAllBytes(String path, Boolean cloud) in tModLoader\Terraria\Utilities\FileUtilities.cs:line 70
at Terraria.IO.WorldFile.InternalSaveWorld(Boolean useCloudSaving, Boolean resetTime) in tModLoader\Terraria\IO\WorldFile.cs:line 544
at Terraria.IO.WorldFile.<>c__DisplayClass57_0.<SaveWorld>b__0() in tModLoader\Terraria\IO\WorldFile.cs:line 500
at Terraria.Utilities.FileUtilities.ProtectedInvoke(Action action) in tModLoader\Terraria\Utilities\FileUtilities.cs:line 170
at Terraria.IO.WorldFile.SaveWorld(Boolean useCloudSaving, Boolean resetTime) in tModLoader\Terraria\IO\WorldFile.cs:line 499
at Terraria.IO.WorldFile.SaveWorld() in tModLoader\Terraria\IO\WorldFile.cs:line 476
at Terraria.WorldGen.saveAndPlayCallBack(Object threadContext) in tModLoader\Terraria\WorldGen.cs:line 2630
at System.Threading.QueueUserWorkItemCallback.Execute()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()
at System.Threading.Thread.StartCallback()
kinda just confused what this all means