The unsubscription is not successful.

Error message is :
:11:-2147352567:31:Method '~' of object '~' failed:0::0::11:-2147352567:31:Method '~' of object '~' failed:194:START: VBErrorInfo Description: Method '~' of object '~' failed HelpContext: 1000440 HelpFile: LastDllError: 0 Number: -2147352567 (0x80020009) Source: Agent_BUS END: VBErrorInfo :312:START: AppInfo ComputerName: PAZ02HTP3643 Operating System: Windows 2003 5.2.3790 (Service Pack 2) Time: Fri 2017:01:20 08:58:48 Title: Agent_BUS EXEName: Agent_BUS Path: D:\Components\TPO Components Version: 15.30.1 Unattended: True Retained: True StartMode: 1 Thread: 6268 END: AppInfo :337:START: ContextInfo IsInTransaction: True ContextInfo.ActivityId: {572D7D83-93A1-4CB2-8A4C-D3C778562F5D} ContextInfo.ContextId: {35D89871-EFF4-419D-BEC6-A1FB50E7B671} ContextInfo.IsInTransaction: True ContextInfo.TransactionId: {4783B4C7-BEA1-4A06-9E52-540ED60D4C11} IsSecurityEnabled: False ItemCount: 5 END: ContextInfo :38:START: ADODBErrors END: ADODBErrors :1:0:176:VB Error Source: Agent_BUS ** Computer: PAZ02HTP3643 App Path: D:\Components\TPO Components\Agent_BUS Filename: Contact_RW Function: UpdateContactEmailSubscriptionStatus: