Hello Nageshwar Ratcha,
This warning is shown by STAAD in order to give the user an alert that for a particular member two or more property section is defined, which as per your query is for member 42 hence an alert is shown to the user to make aware that among all the property that were assigned the latest property section value is considered for the analysis of the structure.
This warning is shown by STAAD in order to give the user an alert that for a particular member two or more property section is defined, which as per your query is for member 42 hence an alert is shown to the user to make aware that among all the property that were assigned the latest property section value is considered for the analysis of the structure.