Problem facing in logger concept in asp.net

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ASP.NET

logging

Actually in my web project i am using logger concept to save user operations. it is working but my where i am facing the problem is when a user-A is loggedin means it is saving properly his operations in database but at the same time when another user-B is logged in means it is overlaping the information by saving User-B with User-A Details in database. is there any solution

GlobalDiagnosticsContext.Set("PageViewed", "mInbox Page");
                GlobalDiagnosticsContext.Set("PageType", "Mob");
                GlobalDiagnosticsContext.Set("TimeStamp", DateTime.Now.ToString());
                GlobalDiagnosticsContext.Set("UserId", Session["UserID"].ToString());
                logger.Info("*** mInbox Page ***");