diff --git a/assets/ObfuscatorTest.pbix b/assets/ObfuscatorTest.pbix
index e8b9a11..35927d4 100644
Binary files a/assets/ObfuscatorTest.pbix and b/assets/ObfuscatorTest.pbix differ
diff --git a/src/Dax.Vpax.Obfuscator/DaxModelObfuscator.cs b/src/Dax.Vpax.Obfuscator/DaxModelObfuscator.cs
index a2512f9..dd548a7 100644
--- a/src/Dax.Vpax.Obfuscator/DaxModelObfuscator.cs
+++ b/src/Dax.Vpax.Obfuscator/DaxModelObfuscator.cs
@@ -67,6 +67,10 @@ void CreateKpiMeasure(DaxExpression kpi, string type)
             var text = new DaxText($"_{measureText.Value} {type}");
             text.ObfuscatedValue = $"_{measureText.ObfuscatedValue} {type}";
 
+            // It may already exist in case of incremental obfuscation
+            if (Texts.IsIncrementalObfuscation && Texts.Contains(text))
+                return;
+
             Texts.Add(text);
         }
     }
diff --git a/src/Dax.Vpax.Obfuscator/DaxTextCollection.cs b/src/Dax.Vpax.Obfuscator/DaxTextCollection.cs
index e09df7a..4987f2d 100644
--- a/src/Dax.Vpax.Obfuscator/DaxTextCollection.cs
+++ b/src/Dax.Vpax.Obfuscator/DaxTextCollection.cs
@@ -13,11 +13,14 @@ public DaxTextCollection(ObfuscationDictionary? dictionary = null)
     {
         if (dictionary != null)
         {
+            IsIncrementalObfuscation = true;
             foreach (var text in dictionary.Texts)
                 Add(new DaxText(text.Value, text.Obfuscated));
         }
     }
 
+    public bool IsIncrementalObfuscation { get; }
+
     public int Count => _plaintexts.Count;
 
     public bool IsReadOnly => false;