diff --git a/src/ert/run_models/everest_run_model.py b/src/ert/run_models/everest_run_model.py
index 6bde26d9950..60ac744959f 100644
--- a/src/ert/run_models/everest_run_model.py
+++ b/src/ert/run_models/everest_run_model.py
@@ -758,12 +758,12 @@ def __init__(self) -> None:
 
     def add(
         self,
-        realization_id: int,
+        realization_name: int,
         control_values: NDArray[np.float64],
         objectives: NDArray[np.float64],
         constraints: NDArray[np.float64] | None,
     ) -> None:
-        self._data[realization_id].append(
+        self._data[realization_name].append(
             (
                 control_values.copy(),
                 objectives.copy(),