Stress Comparison of Version V11.03.00.08 and Version V12.08.00.063

We have modelled a 20” Pipe with fixed supports at both ends with a point load of 10kN at center, we have analyzed using DNV and found that there is some mismatch in Stress values between version V11.03.00.08 and Version V12.08.00.063.

All the relevant files (of the versions) are attached herewith and also find below the snapshots.

Kindly request you to check and advise what is the main change in the latest version?  Why there is change in stress even though formulas are same.