Error In Page

Error Message: Item has already been added. Key in dictionary: 'SystemLogo' Key being added: 'SystemLogo'

Stack Trace:
System.ArgumentException: Item has already been added. Key in dictionary: 'SystemLogo' Key being added: 'SystemLogo'
at System.Collections.Hashtable.Insert(Object key, Object nvalue, Boolean add)
at Dea.MasterCalendar.Configuration.ParameterUtility.GetImage(String key, Int32 imageId)
at Controls_Header.Page_Load(Object sender, EventArgs e)
at System.Web.UI.Control.OnLoad(EventArgs e)
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

Additional Information
ErrorCaughtBy: ExpectedError.aspx
PatchNumber: 201805210
ClientName:
Product: