Error: (100) System Exception: Add failed. Duplicate key value supplied...

Scenario

(100) System.Exception: System.ArgumentException: Add failed. Duplicate key value supplied. at Microsoft.VisualBasic.Collection.Add(Object Item, String Key, Object Before, Object After) at GFR_LookuplistSync.IniFile.Initialize() at GFR_LookuplistSync.SyncLookuplist.tmrSyncLookuplist_Elapsed(Object sender, ElapsedEventArgs e)

Cause

Solution

Navigate to the appropriate location below, based on the operating system on the computer where the Lookup List Sync service is installed.
64-bit operating system:
C:\Program Files (x86)\GoFileRoom\GFRLookupListSync.
32-bit operating system:
C:\Program Files\GoFileRoom\GFRLookupListSync.
Right-click the
GFR_LookupListSync INI (Manage).exe
file, then select
Run as administrator
.
Select the
List
tab.
Delete any duplicate queries, select
Apply
and then
OK
.
Select the Windows Start button, then select
Run
. Enter
services.msc
in the Open field.
Locate the GFR Lookup List Sync service. Right-click the service, then select
Restart
.