diff --git a/data-generator-plugin/src/main/java/it/cavallium/data/generator/plugin/classgen/GenDataSuperX.java b/data-generator-plugin/src/main/java/it/cavallium/data/generator/plugin/classgen/GenDataSuperX.java
index 63f1bfb..a03f3b4 100644
--- a/data-generator-plugin/src/main/java/it/cavallium/data/generator/plugin/classgen/GenDataSuperX.java
+++ b/data-generator-plugin/src/main/java/it/cavallium/data/generator/plugin/classgen/GenDataSuperX.java
@@ -41,7 +41,7 @@ public class GenDataSuperX extends ClassGenerator {
 			classBuilder.addSuperinterface(iTypeClass);
 		});
 
-		dataModel.getExtendsInterfaces(typeSuper).forEach(superType -> {
+		dataModel.getExtendsInterfaces(typeSuper).distinct().forEach(superType -> {
 			classBuilder.addSuperinterface(superType.getJTypeName(basePackageName));
 		});