diff --git a/Assets/XCharts/Runtime/Internal/DrawSerieRadar.cs b/Assets/XCharts/Runtime/Internal/DrawSerieRadar.cs
index 5e20a9f4..7700ed5a 100644
--- a/Assets/XCharts/Runtime/Internal/DrawSerieRadar.cs
+++ b/Assets/XCharts/Runtime/Internal/DrawSerieRadar.cs
@@ -312,9 +312,9 @@ namespace XCharts
                     serieIndex = serieNameCount;
                 }
                 else if (!serieNameSet.ContainsKey(dataName))
-                {
-                    serieNameSet.Add(dataName, serieNameCount);
+                {                    
                     serieNameCount++;
+                    serieNameSet.Add(dataName, serieNameCount);
                     serieIndex = serieNameCount;
                 }
                 else
@@ -482,8 +482,8 @@ namespace XCharts
                 }
                 else if (!serieNameSet.ContainsKey(dataName))
                 {
+                    serieNameCount++;
                     serieNameSet.Add(dataName, serieNameCount);
-                    serieNameCount++;
                     serieIndex = serieNameCount;
                 }
                 else