diff --git a/tracking/monitors/monitors.py b/tracking/monitors/monitors.py
index a543fdf91704dda41a9958b3e2cb9ce05735a681..5aa58a32a1707bd8fe5b8efd9f5420be1a4e9057 100644
--- a/tracking/monitors/monitors.py
+++ b/tracking/monitors/monitors.py
@@ -125,10 +125,10 @@ class Monitor(Element, metaclass=ABCMeta):
                 if len(self._file_storage) == 0:
                     if mpi_mode == True:
                         from mpi4py import MPI
-                        f = hp.File(self.file_name, "w", libver='latest', 
+                        f = hp.File(self.file_name, "w", libver='earliest', 
                              driver='mpio', comm=MPI.COMM_WORLD)
                     else:
-                        f = hp.File(self.file_name, "w", libver='latest')
+                        f = hp.File(self.file_name, "w", libver='earliest')
                     self._file_storage.append(f)
                 else:
                     raise ValueError("File is already open.")