diff --git a/studenteval/admin.py b/studenteval/admin.py
index 9211148..8b2ef4a 100644
--- a/studenteval/admin.py
+++ b/studenteval/admin.py
@@ -29,15 +29,16 @@ class _cl_Student_eval_admin(admin.ModelAdmin):
 
 
     search_fields = ['sStudent', 'sRef']
-    list_filter = ['sStudent',"sAuthor", "nEval_Type", "nEval_Mode", ('dtDate', DateRangeFilter)]
+    list_filter = ['sStudent',"sAuthor", "nEval_Type", "nEval_Mode"]
 
     def get_form(self, request, obj=None, **kwargs):
         user_obj = request.user
-        author_id = obj.Author.id if obj.Author is not None else 0
-        student_id = obj.Student.id if obj.Student is not None else 0
+        if obj is not None:
+            author_id = obj.Author.id if obj.Author is not None else 0
+            student_id = obj.Student.id if obj.Student is not None else 0
 
-        if not user_obj.id == author_id and not user_obj.id == student_id and not is_member(user_obj, "FI-Encadrants"):
-            raise PermissionDenied
+            if not user_obj.id == author_id and not user_obj.id == student_id and not is_member(user_obj, "FI-Encadrants"):
+                raise PermissionDenied
         return super().get_form(request, obj, **kwargs)
 
 
diff --git a/studenteval/models.py b/studenteval/models.py
index cea567c..38bb6d0 100644
--- a/studenteval/models.py
+++ b/studenteval/models.py
@@ -118,7 +118,7 @@ class cl_Student_eval(models.Model):
             if eval.ID == self.ID:
                 to_be_set = True
             else:
-                #print(f"check eval {eval}")
+                #print(f"check eval {eval} {eval.nEval_Type} ({eval.nEval_Type == 1}) ? {eval.sRef} ==  {self.sRef} => {eval.sRef == self.sRef} {self}")
                 if eval.nEval_Type == "1" and eval.sRef == self.sRef:
                     print(f"Eval mirror found {eval} / {self}")
                     to_be_set = True
@@ -127,9 +127,9 @@ class cl_Student_eval(models.Model):
                     to_be_set = True
 
             if to_be_set:
-                if eval.nEval_Mode == 1:
+                if eval.nEval_Mode == "1":
                     self.o_Auto_eval = eval
-                elif eval.nEval_Mode == 2:
+                elif eval.nEval_Mode == "2":
                     self.o_Encadrant_eval = eval