The Web Service plug-in failed in OrganizationId:; SdkMessageProcessingStepId: ; EntityName: contact; Stage: 30; MessageName: Update;

Hi CRM Dev's,

The update action of Contact form is not working when I modify an address field. Throwing the below log event errors:

The Web Service plug-in failed in OrganizationId: ; SdkMessageProcessingStepId: 9; EntityName: contact; Stage: 30; MessageName: Update; AssemblyName: Microsoft.Crm.Extensibility.InternalOperationPlugin, Microsoft.Crm.ObjectModel, Version=6.0.0.0, Culture=neutral, PublicKeyToken=; ClassName: Microsoft.Crm.Extensibility.InternalOperationPlugin; Exception: Unhandled Exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.Web.Services.Protocols.LogicalMethodInfo.Invoke(Object target, Object[] values)
   at Microsoft.Crm.Extensibility.InternalOperationPlugin.Execute(IServiceProvider serviceProvider)
   at Microsoft.Crm.Extensibility.V5PluginProxyStep.ExecuteInternal(PipelineExecutionContext context)
   at Microsoft.Crm.Extensibility.VersionedPluginProxyStepBase.Execute(PipelineExecutionContext context)
Inner Exception: System.InvalidCastException: Specified cast is not valid.
   at Microsoft.Crm.BusinessEntities.AddressTrigger.Update(Guid id)
   at Microsoft.Crm.BusinessEntities.TriggersExtension.ExecuteTriggers(BusinessEntity entity, ArrayList triggers, OperationType operationType)
   at Microsoft.Crm.BusinessEntities.BusinessProcessObject.DoUpdate(IBusinessEntity entity, FilterExpression filter, ExecutionContext context)
.

Error Details:  <ErrorCode>-2147220970</ErrorCode>
  <ErrorDetails xmlns:d2p1="http://schemas.datacontract.org/2004/07/System.Collections.Generic" />
  <Message>An unexpected error occurred.</Message>

I have struck on this error for last 1 week. please suggest a solution, greatly appreciated.

Thank you.

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