Server Error in '/' Application.

DatabaseHelper Error! - Ambiguous column name 'year'.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Exception: DatabaseHelper Error! - Ambiguous column name 'year'.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[Exception: DatabaseHelper Error! - Ambiguous column name 'year'.]
   DTWebSettings.DatabaseHelper.ShowError(Exception ex) +379
   DTWebSettings.DatabaseHelper.Select(String QueryString) +336
   Members_Users_Level.Page_Load(Object sender, EventArgs e) +351
   System.Web.UI.Control.OnLoad(EventArgs e) +106
   System.Web.UI.Control.LoadRecursive() +68
   System.Web.UI.Control.LoadRecursive() +162
   System.Web.UI.Control.LoadRecursive() +162
   System.Web.UI.Control.LoadRecursive() +162
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3785


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.7.4081.0