SecStatusCode value returned does not equate to anything in the Enum?

Question

I am trying to remove a service from my keychain in my Xamarin project doing the following:

public void DeleteAccounts()
{
    foreach (var service in Services)
    {
       var query = new SecRecord(SecKind.GenericPassword);
       query.Service = CreateAlias(service);

       var statusCode = SecKeyChain.Remove(query);
    }

}

But the SecStatusCode returned by the SecKeyChain.Remove(query) is the value -34018

This doesnt equate to any value in the SecStatusCode Definitions

So what does this value equate to in my enum? I can't begin to diagnose the problem knowing what the return code equates to