ошибка после Update-SPSolution

this task is currently locked by a running workflow and cannot be edited

Event "OnTaskChanged" on interface type "Microsoft.SharePoint.Workflow.ITaskService" for instance id "" cannot be delivered.

Engine RunWorkflow: System.Workflow.Activities.EventDeliveryFailedException: Event "OnTaskChanged" on interface type "Microsoft.SharePoint.Workflow.ITaskService" for instance id "71d5049d-5db6-488e-9695-dc477f8a9ba9" cannot be delivered. ---> System.IndexOutOfRangeException: Index was outside the bounds of the array.  
 at System.Workflow.ComponentModel.Serialization.ActivitySurrogate.ActivitySerializedRef.System.Runtime.Serialization.IDeserializationCallback.OnDeserialization(Object sender)  
 at System.Runtime.Serialization.DeserializationEventHandler.Invoke(Object sender)  
 at System.Runtime.Serialization.ObjectManager.RaiseDeserializationEvent()  
 at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)  
 at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)  
 at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream)