diff --git a/src/main/java/de/dhbwstuttgart/bytecode/gGenericsAli/ClassConstraint.java b/src/main/java/de/dhbwstuttgart/bytecode/gGenericsAli/ClassConstraint.java
index 7f86e9359..fd5ffcaed 100644
--- a/src/main/java/de/dhbwstuttgart/bytecode/gGenericsAli/ClassConstraint.java
+++ b/src/main/java/de/dhbwstuttgart/bytecode/gGenericsAli/ClassConstraint.java
@@ -3,7 +3,7 @@ package de.dhbwstuttgart.bytecode.gGenericsAli;
 import de.dhbwstuttgart.bytecode.constraint.TPHConstraint;
 
 public class ClassConstraint extends TPHConstraint {
-    private TPHConstraint constraint;
+    //private TPHConstraint constraint;
 
     public ClassConstraint(String left, String right, Relation rel) {
         super(left, right, rel);
diff --git a/src/main/java/de/dhbwstuttgart/bytecode/gGenericsAli/FamilyOfGeneratedGenerics.java b/src/main/java/de/dhbwstuttgart/bytecode/gGenericsAli/FamilyOfGeneratedGenerics.java
index 97d005fed..96f2cb74e 100644
--- a/src/main/java/de/dhbwstuttgart/bytecode/gGenericsAli/FamilyOfGeneratedGenerics.java
+++ b/src/main/java/de/dhbwstuttgart/bytecode/gGenericsAli/FamilyOfGeneratedGenerics.java
@@ -15,17 +15,24 @@ public class FamilyOfGeneratedGenerics {
 
     public static List<ClassConstraint> getClassConstraints(List<TPHConstraint> cs, HashMap<String, PositionFinder.Position> posOfTphs) { //Inputparameter List<TPHConstraint> constraintsSet weg
         List<ClassConstraint> cs_cl = new ArrayList<>();
-        System.out.println("0: " + cs_cl);
         List<ClassConstraint> classConstraints1 = typeOfANodeOfAField(cs, cs_cl, posOfTphs);
-        cs_cl.addAll(classConstraints1);
-        System.out.println("1: " + cs_cl);
+        for (ClassConstraint cons: classConstraints1) {
+            if (!checkForDuplicates(cons, cs_cl)) {
+                cs_cl.add(cons);
+            }
+        }
         List<ClassConstraint> classConstraints2 = transitiveSubtypeForClassTypes(cs, cs_cl); // in Klammer classConstraints1 oder constraintsSet? beides eher
-        cs_cl.addAll(classConstraints2);
-        System.out.println("2: " + cs_cl);
+        for (ClassConstraint cons: classConstraints2) {
+            if (!checkForDuplicates(cons, cs_cl)) {
+                cs_cl.add(cons);
+            }
+        }
         List<ClassConstraint> classConstraints3 = hasNoSupertypeForClassTypes(cs, cs_cl, posOfTphs);
-        cs_cl.addAll(classConstraints3);
-        System.out.println("3: " + cs_cl);
-
+        for (ClassConstraint cons: classConstraints3) {
+            if (!checkForDuplicates(cons, cs_cl)) {
+                cs_cl.add(cons);
+            }
+        }
         return cs_cl;
     }
 
@@ -49,7 +56,10 @@ public class FamilyOfGeneratedGenerics {
             if(posOfTphs.containsKey(allCons.getLeft()) && allCons.getRight()!=null && allCons.getRel()==Relation.EXTENDS) {
                 for(String tph: posOfTphs.keySet()) {
                     if(tph == allCons.getLeft() && posOfTphs.get(tph) == PositionFinder.Position.FIELD) {
-                        tempCC.add(new ClassConstraint(allCons.getLeft(), allCons.getRight(), allCons.getRel()));
+                        ClassConstraint consToAdd = new ClassConstraint(allCons.getLeft(), allCons.getRight(), allCons.getRel());
+                        if (!checkForDuplicates(consToAdd, tempCC)) {
+                            tempCC.add(consToAdd);
+                        }
                     }
                 }
             }
@@ -68,7 +78,10 @@ public class FamilyOfGeneratedGenerics {
             if(cCons.getLeft() != null && cCons.getRel()==Relation.EXTENDS) {
                 for(TPHConstraint allCons: allConstraints) {
                     if(cCons.getRight() == allCons.getLeft() && allCons.getRight() != null && allCons.getRel()==Relation.EXTENDS){
-                        tempCC.add(new ClassConstraint(allCons.getLeft(), allCons.getRight(), allCons.getRel()));
+                        ClassConstraint consToAdd = new ClassConstraint(allCons.getLeft(), allCons.getRight(), allCons.getRel());
+                        if (!checkForDuplicates(consToAdd, tempCC)) {
+                            tempCC.add(consToAdd);
+                        }
                     }
                 }
             }
@@ -92,7 +105,6 @@ public class FamilyOfGeneratedGenerics {
                                     (allCons.getLeft() == tph && allCons.getRight() == null) &&
                                     allCons.getRel()==Relation.EXTENDS && cCons.getRel()==Relation.EXTENDS &&
                                     cCons.getRight() == tph && allCons.getLeft() == tph) {
-                        System.out.println("C3: " + allCons);
                         ClassConstraint consToAdd = new ClassConstraint(cCons.getRight(), "Object", Relation.EXTENDS);
                         if (!checkForDuplicates(consToAdd, tempCC)){
                             tempCC.add(consToAdd);