The unsubscription is not successful.

Error message is :
:11:-2147352567:31:Method '~' of object '~' failed:0::0::11:-2147352567:31:Method '~' of object '~' failed:196:START: VBErrorInfo Description: Method '~' of object '~' failed HelpContext: 1000440 HelpFile: LastDllError: 203 Number: -2147352567 (0x80020009) Source: Agent_BUS END: VBErrorInfo :323:START: AppInfo ComputerName: PAZ02HTP3646 Operating System: Unknown_OS PlatformID:2 6.1.7601 (Service Pack 1) Time: Sun 2017:03:26 19:41:22 Title: Agent_BUS EXEName: Agent_BUS Path: D:\Components\TPO Components Version: 15.30.1 Unattended: True Retained: True StartMode: 1 Thread: 2236 END: AppInfo :337:START: ContextInfo IsInTransaction: True ContextInfo.ActivityId: {95A4292E-2898-4537-945F-52A863A843D0} ContextInfo.ContextId: {F40B4476-1EB8-4A3F-9C2E-73B008283394} ContextInfo.IsInTransaction: True ContextInfo.TransactionId: {6F714423-7638-4328-AE14-6AD174065AF8} IsSecurityEnabled: False ItemCount: 5 END: ContextInfo :38:START: ADODBErrors END: ADODBErrors :1:0:176:VB Error Source: Agent_BUS ** Computer: PAZ02HTP3646 App Path: D:\Components\TPO Components\Agent_BUS Filename: Contact_RW Function: UpdateContactEmailSubscriptionStatus: