Answer:
In the dialog box of structural analysis settings, you can find the "Equilibrium for undeformed structure" checkbox under Options II (Image 01). If this is active, the structure is analyzed with the deformation reset to 0.
In the following, you can see an example of the result of the primary stress state determination; that is, the analysis of a soil massif subjected to its own weight. In Construction Stage 2, the "Equilibrium for undeformed structure" option is activated in the structural analysis settings, compared to Construction Stage 1 with the inactive option.
The results are compared in Image 02.
It becomes clear that the stress state in the structures is the same, but when this option is activated, the deformations are reset to 0.