Change Stereotype of a Class, API

[zalbina]

Hello,

Another one surprise from EA. I'm trying change Stereotype of a Class using API or SQL stetement. Nothing happened. My code:

if (element.Type =="Class")
{
element.Stereotype ="NewStereotype";
element.Update();
}
  The Message :"Element Locked" I don't uderstand because I Applied my User Locked.

When I used SQL Query: MyRepository.Execute("Update t_object bla-bla");
It did not do it's job.

What is wrong?

Thanks.