The unsubscription is not successful.

Error message is :
:5:65010:23:Agent: Record not found:0::0::5:65010:23:Agent: Record not found:176:START: VBErrorInfo Description: Agent: Record not found HelpContext: 1065010 HelpFile: LastDllError: 0 Number: 65010 (0xFDF2) Source: Agent_BUS END: VBErrorInfo :323:START: AppInfo ComputerName: PAZ02HTP3645 Operating System: Unknown_OS PlatformID:2 6.1.7601 (Service Pack 1) Time: Sat 2017:10:21 21:39:35 Title: Agent_BUS EXEName: Agent_BUS Path: D:\Components\TPO Components Version: 15.50.2 Unattended: True Retained: True StartMode: 1 Thread: 3600 END: AppInfo :337:START: ContextInfo IsInTransaction: True ContextInfo.ActivityId: {3D644B1E-95C0-4099-8513-16D221AFE564} ContextInfo.ContextId: {2D52AA4B-B2FF-40B4-AE10-EA4B2EA74172} ContextInfo.IsInTransaction: True ContextInfo.TransactionId: {56118570-D479-49F9-94AD-78C6D0ACB531} IsSecurityEnabled: False ItemCount: 5 END: ContextInfo :38:START: ADODBErrors END: ADODBErrors :1:0:303:VB Error Source: Agent_BUS ** Computer: PAZ02HTP3645 App Path: D:\Components\TPO Components\Agent_BUS Filename: Contact_RW Function: UpdateContact ** Computer: PAZ02HTP3645 App Path: D:\Components\TPO Components\Agent_BUS Filename: Contact_RW Function: UpdateContactEmailSubscriptionStatus: