initial stage, prestress, encaster, which one is first.

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I assigned the below at initial step.

* predefined field - prestress

* boundary - encaster

They are at the same step.

However, depending on the sequence of two, the result should be different.

Q1.  Which one is activated first ? 

Q2. If boundary conditions and loads are applied at the same step, how ABAQUS prioritize the sequence ?