diff --git a/openstef/tasks/create_forecast.py b/openstef/tasks/create_forecast.py
index 91b0ae49c..882884ae4 100644
--- a/openstef/tasks/create_forecast.py
+++ b/openstef/tasks/create_forecast.py
@@ -97,7 +97,7 @@ def create_forecast_task(pj: PredictionJobDataClass, context: TaskContext) -> No
             return
         elif isinstance(e, InputDataOngoingZeroFlatlinerError):
             raise InputDataOngoingZeroFlatlinerError(
-                'Consider adding this pid to the "known_zero_flatliners" app_setting.'
+                'All recent load measurements are zero. Check the load profile of this pid as well as related/neighbouring prediction jobs. Afterwards, consider adding this pid to the "known_zero_flatliners" app_setting and possibly removing other pids from the same app_setting.'
             ) from e
         elif isinstance(e, LookupError):
             raise LookupError(
diff --git a/openstef/tasks/train_model.py b/openstef/tasks/train_model.py
index a1f383c08..e13d619ee 100644
--- a/openstef/tasks/train_model.py
+++ b/openstef/tasks/train_model.py
@@ -165,7 +165,7 @@ def train_model_task(
             return
         else:
             raise InputDataOngoingZeroFlatlinerError(
-                'All recent load measurements are zero. Consider adding this pid to the "known_zero_flatliners" app_setting.'
+                'All recent load measurements are zero. Check the load profile of this pid as well as related/neighbouring prediction jobs. Afterwards, consider adding this pid to the "known_zero_flatliners" app_setting and possibly removing other pids from the same app_setting.'
             )
 
 
diff --git a/test/unit/tasks/test_create_forecast.py b/test/unit/tasks/test_create_forecast.py
index 8ca0197d1..eb0b59d0c 100644
--- a/test/unit/tasks/test_create_forecast.py
+++ b/test/unit/tasks/test_create_forecast.py
@@ -157,7 +157,7 @@ def test_create_forecast_unexpected_zero_flatliner(self):
 
         assert (
             e.value.args[0]
-            == 'Consider adding this pid to the "known_zero_flatliners" app_setting.'
+            == 'All recent load measurements are zero. Check the load profile of this pid as well as related/neighbouring prediction jobs. Afterwards, consider adding this pid to the "known_zero_flatliners" app_setting and possibly removing other pids from the same app_setting.'
         )
 
     @patch(
diff --git a/test/unit/tasks/test_train_model.py b/test/unit/tasks/test_train_model.py
index 2054c3962..12a81c67b 100644
--- a/test/unit/tasks/test_train_model.py
+++ b/test/unit/tasks/test_train_model.py
@@ -85,7 +85,7 @@ def test_train_model_unexpected_zero_flatliner(self):
             train_model_task(self.pj, context)
         self.assertEqual(
             e.value.args[0],
-            'All recent load measurements are zero. Consider adding this pid to the "known_zero_flatliners" app_setting.',
+            'All recent load measurements are zero. Check the load profile of this pid as well as related/neighbouring prediction jobs. Afterwards, consider adding this pid to the "known_zero_flatliners" app_setting and possibly removing other pids from the same app_setting.',
         )
 
     @patch("openstef.model.serializer.MLflowSerializer.save_model")