Inserting a new Column in Pivot Table

Hi,
I want to add a new column in the pivot table which has been system generated. I tried manually to enter a new column, but its not happenning. I attached the sample sheet generated by system. I want to add a New Column in the 1st sheet(Traceability Matrix) after the "Source Requirements" column(Row-8).

Please do let me know if it can be done through Macro.