diff --git a/main.py b/main.py
index 5e51d7c..4e0315d 100644
--- a/main.py
+++ b/main.py
@@ -91,13 +91,21 @@ def csv_output():
     select_medium_id = moviedb_func.search_id(
         search_name=select_medium, select_from="medium", select_where="medium")
 
-    if moviedb_func.scrape_and_add_movie(movie_name=select_add_movie,
-                                     medium_id=select_medium_id, user_id=current_user.id):
+    add_status = moviedb_func.scrape_and_add_movie(movie_name=select_add_movie,
+                                                 medium_id=select_medium_id, user_id=current_user.id)
+
+    if add_status == "success":
         flash("Film erfolgreich hinzugefügt!")
         return redirect(url_for('index'))
-    else:
-        flash("Film konnte nicht automatisch hinzugefügt werden. Bitte versuchen Sie die manuelle Eingabe.")
+    elif add_status == "duplicate":
+        flash("Fehler: Dieser Film existiert bereits in deiner Liste.")
+        return redirect(url_for('add_movie'))
+    elif add_status == "not_found_imdb":
+        flash("Film konnte nicht bei IMDb gefunden werden. Bitte versuchen Sie die manuelle Eingabe.")
         return redirect(url_for('add_movie_manually', movie_name=select_add_movie, medium_id=select_medium_id))
+    else: # "error" or any other unexpected status
+        flash("Ein unerwarteter Fehler ist aufgetreten. Film konnte nicht hinzugefügt werden.")
+        return redirect(url_for('add_movie'))
 
 @app.get("/add_movie_manually")
 @login_required
diff --git a/moviedb_func.py b/moviedb_func.py
index 707813e..0819085 100644
--- a/moviedb_func.py
+++ b/moviedb_func.py
@@ -248,11 +248,11 @@ def search_id(search_name: str, select_from: str = "genre", select_where: str =
 def scrape_and_add_movie(movie_name: str, medium_id: int, user_id: int, db_name: str = "movie_db.db"):
     url = imdb_suche.suche_film_url(movie_name)
     if not url:
-        return False
+        return "not_found_imdb"
 
     details = get_movie_details(url + "/")
     if not details:
-        return False
+        return "not_found_imdb"
 
     regie_id = None
     if details.get("director"):
@@ -272,10 +272,16 @@ def scrape_and_add_movie(movie_name: str, medium_id: int, user_id: int, db_name:
         with DBcm.UseDatabase(db_name) as db:
             db.execute(SQL_PARAM, (movie_name.lower(), genre_id,
                        regie_id, medium_id, release_year, user_id,))
-    except (ProgrammingError, sqlite3.IntegrityError) as e:
+    except sqlite3.IntegrityError as e:
+        print(f"Error adding movie (duplicate): {e}")
+        return "duplicate"
+    except ProgrammingError as e:
         print(f"Error adding movie: {e}")
-        return False
-    return True
+        return "error"
+    except Exception as e:
+        print(f"An unexpected error occurred: {e}")
+        return "error"
+    return "success"
 
 
 def add_manual_movie(movie_name: str, medium_id: int, director_name: str, release_year: int, genre_name: str, user_id: int, db_name: str = "movie_db.db"):