Updated

EonaCat.Logger/Managers/LogHelper.cs

@@ -59,10 +59,19 @@ namespace EonaCat.logger.Managers
                 header = header.Replace("{sev}", logType.ToString());
             }
 
-            string fullMessage = "[EonaCatLogger]" + " " + header + " " + currentMessage;
+            string fullMessage = AddHeaderIfNotExists(header, currentMessage);
             return fullMessage;
         }
 
+        private static string AddHeaderIfNotExists(string header, string currentMessage)
+        {
+            if (!currentMessage.Contains("[EonaCatLogger]"))
+            {
+                return "[EonaCatLogger]" + " " + header + " " + currentMessage;
+            }
+            return currentMessage;
+        }
+
         /// <summary>
         /// Formats a given exception as a string
         /// </summary>