There was a mistake have done while creating the lists in the designation site and tried to deployed the package from source site. That time K2 designer got corrupted and could not open the designer again, There error was as below. After that have deleted the entire list that caused the issue then also i couldn’t open again, Please provide input. Its very urgent and affecting the productivity also.
Server ErrorThe item name must be unique. 'Title' exists in the collection.
at SourceCode.SmartObjects.Management.SmartPropertyInfoCollection.Add(SmartPropertyInfo item)
This could be due to the SmartObject having a duplicate propery in its XML. You may check this from the [SmartBroker].[SmartObject] table in the K2 database.