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 :322:START: AppInfo ComputerName: PAZ02HTP3646 Operating System: Unknown_OS PlatformID:2 6.1.7601 (Service Pack 1) Time: Sun 2017:08:20 08:22:58 Title: Agent_BUS EXEName: Agent_BUS Path: D:\Components\TPO Components Version: 15.50.2 Unattended: True Retained: True StartMode: 1 Thread: 476 END: AppInfo :337:START: ContextInfo IsInTransaction: True ContextInfo.ActivityId: {9BDFE716-D99B-4339-AB50-5323183A442B} ContextInfo.ContextId: {F4487AB3-7A3F-4908-88C5-8D5D378552A0} ContextInfo.IsInTransaction: True ContextInfo.TransactionId: {A301881B-5F2E-4656-8C27-7EBFD169833C} 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: