Problem with Update Account through WS - newbie

Question

Hi everyone,
I'm having problem when updating an Account through the web services. The error is SBL-EAI-04381, it seems like a duplicate error... but it is an update and isn't the ID the primary key? or is it compound and I am missing another field?
The error I receive is this:
+La instancia de componente de integración 'Account' con la clave de usuario '[Id] = "AAFA-3WME5H"' ya existe en la base de datos de Siebel.+
Asegúrese de que los valores de campo del mensaje de entrada no estén repetidos.(SBL-EAI-04381)
I am using C# for this project. I am first making a query of the account and then creating a new account1 object for making the update.
The portion of code where I am making the WS call is this. The Account accRef object is the proxy class made by the WSDL tool.
Account accRef = new Account();
accRef.Url += ";jsessionid=" + this.sessionManager.JSessionID;
AccountWS_AccountUpdate_Input qIt = new AccountWS_AccountUpdate_Input();
qIt.ListOfAccount = new Account1[1];
qIt.ListOfAccount[0] = accountData;
AccountWS_AccountUpdate_Output qOt = new AccountWS_AccountUpdate_Output();
qOt = accRef.AccountUpdate(qIt);
The code where I am filling the AccountData object is this:
Account1 ac = new Account1();
ac.AccountId = fields[0];
ac.AccountName = fields[1];
ac.CreatedDate = fields[2];
Am I missing some fields or option to check? I will appreciate any input.
Thanks,
Mario

Answer 1

I have found the problem and it was because I made a mistake in coding when creating the Account Object.
I have been putting the ID in the ID and the accountname too...
The error of duplicate could be because AccounName and ID are identity fields as you have said. I debug it again and found the problem.
Thanks for your help Jaya,
Mario