Move file in Sharepoint - Error: Bad Request

[CedricCosta]

Hello Community,

I'm experiencing an error while moving a file in my Teams Sharepoint folder, which you can see below:

It says: 

{
  "status": 400,
  "message": "An item with the same key has already been added. CallStack --    at System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)\r\n   at System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)\r\n   at Microsoft.SharePoint.Deployment.MetaInfoHandler.Add(MetaInfoProperty property)\r\n   at Microsoft.SharePoint.Deployment.FileSerializer.HandleMetaInfo(ExportObjectManager objectManager, SPWeb parentWeb, Object metaInfoObject, SerializationInfo info, Guid listID, Guid itemID, String itemETag)\r\n   at Microsoft.SharePoint.Deployment.FileSerializer.GetDataFromDataSet(Object obj, SerializationInfo info, StreamingContext context)\r\n   at Microsoft.SharePoint.Deployment.DeploymentSerializationSurrogate.GetObjectData(Object obj, SerializationInfo info, StreamingContext context)\r\n   at Microsoft.SharePoint.Deployment.XmlFormatter.SerializeObject(Object obj, ISerializationSurrogate surrogate, String elementName, Boolean bNeedEnvelope)\r\n   at Microsoft.SharePoint.Deployment.XmlFormatter.Serialize(Stream serializationStream, Object topLevelObject)\r\n   at Microsoft.SharePoint.Deployment.SPExport.SerializeObjects()\r\n   at Microsoft.SharePoint.Deployment.SPExport.Run()\r\nclientRequestId: 82dfd7e6-4c96-4e82-b298-bba799c58ff8\r\nserviceRequestId: 82dfd7e6-4c96-4e82-b298-bba799c58ff8"
}

I can't figure it out why there should be in item with the same key before the file even gets copied into the folder.

A few connectors before the error occures I also move a file and this works just fine.. 

I hope someone can help me figure it out.

Sincerely,
Cedric

[ChristianAbata]

mmm @CedricCosta  this could be becouse you have a column list that allows unique vales, Please try to chacnge the config of your sharepoint list.

[CedricCosta]

Could you please be a bit more specific on what to change? I found the column settings of my sharepoint folder but all settings are the default ones. Do I have to add a column and force it to have unique values?

Here the default columns (it's in german):

[ChristianAbata]

@CedricCosta  what you need to chacnge is this