diff --git a/app/contributions/routes.py b/app/contributions/routes.py
index d9565f88..f9e4d2c5 100644
--- a/app/contributions/routes.py
+++ b/app/contributions/routes.py
@@ -124,7 +124,10 @@ def delete_spacy_model(spacy_nlp_pipeline_model_id):
     snpm = SpaCyNLPPipelineModel.query.get(spacy_nlp_pipeline_model_id)
     if snpm is None:
         resonse_data = {
-            'message': f'"{snpm.title}" not found',
+            'message': (
+                'SpaCy NLP Pipeline Model with id'
+                f' "{spacy_nlp_pipeline_model_id}" not found'
+            ),
             'category': 'error'
         }
         response = jsonify(resonse_data)
@@ -169,7 +172,10 @@ def update_spacy_nlp_pipeline_model_is_public(spacy_nlp_pipeline_model_id):
     snpm = SpaCyNLPPipelineModel.query.get(spacy_nlp_pipeline_model_id)
     if snpm is None:
         resonse_data = {
-            'message': f'"{snpm.title}" not found',
+            'message': (
+                'SpaCy NLP Pipeline Model with id'
+                f' "{spacy_nlp_pipeline_model_id}" not found'
+            ),
             'category': 'error'
         }
         response = jsonify(resonse_data)
@@ -283,7 +289,10 @@ def delete_tesseract_model(tesseract_ocr_pipeline_model_id):
     topm = TesseractOCRPipelineModel.query.get(tesseract_ocr_pipeline_model_id)
     if topm is None:
         resonse_data = {
-            'message': f'"{topm.title}" not found',
+            'message': (
+                'Tesseract OCR Pipeline Model with id'
+                f' "{tesseract_ocr_pipeline_model_id}" not found'
+            ),
             'category': 'error'
         }
         response = jsonify(resonse_data)
@@ -328,7 +337,10 @@ def update_tesseract_ocr_pipeline_model_is_public(tesseract_ocr_pipeline_model_i
     topm = TesseractOCRPipelineModel.query.get(tesseract_ocr_pipeline_model_id)
     if topm is None:
         resonse_data = {
-            'message': f'"{topm.title}" not found',
+            'message': (
+                'Tesseract OCR Pipeline Model with id'
+                f' "{tesseract_ocr_pipeline_model_id}" not found'
+            ),
             'category': 'error'
         }
         response = jsonify(resonse_data)