diff --git a/pm4py/meta.py b/pm4py/meta.py
index 7d333e211..367fdfc79 100644
--- a/pm4py/meta.py
+++ b/pm4py/meta.py
@@ -15,7 +15,7 @@
     along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
 '''
 __name__ = 'pm4py'
-VERSION = '2.7.5.1'
+VERSION = '2.7.5.2'
 __version__ = VERSION
 __doc__ = 'Process mining for Python'
 __author__ = 'Fraunhofer Institute for Applied Technology'
diff --git a/pm4py/objects/ocel/exporter/sqlite/variants/ocel20.py b/pm4py/objects/ocel/exporter/sqlite/variants/ocel20.py
index 10ae0a53d..9a5f54783 100644
--- a/pm4py/objects/ocel/exporter/sqlite/variants/ocel20.py
+++ b/pm4py/objects/ocel/exporter/sqlite/variants/ocel20.py
@@ -97,7 +97,9 @@ def apply(ocel: OCEL, file_path: str, parameters: Optional[Dict[Any, Any]] = Non
         df = ocel.objects[ocel.objects[object_type] == ot].dropna(how="all", axis="columns")
         df = df.rename(columns={object_id: "ocel_id"})
         del df[object_type]
-        df["ocel_time"] = datetime.fromtimestamp(0)
+        # Pandas 2.1.0 changes the way that datetime is written to SQL, and this is causing problems.
+        df["ocel_time"] = datetime.fromtimestamp(129600)
+        df["ocel_time"] = df["ocel_time"].astype('datetime64[ns]')
 
         df2 = ocel.object_changes[ocel.object_changes[object_type] == ot].dropna(how="all", axis="columns")
         if len(df2) > 0:
diff --git a/pm4py/objects/ocel/importer/sqlite/variants/ocel20.py b/pm4py/objects/ocel/importer/sqlite/variants/ocel20.py
index 99bcadb2d..9f082c998 100644
--- a/pm4py/objects/ocel/importer/sqlite/variants/ocel20.py
+++ b/pm4py/objects/ocel/importer/sqlite/variants/ocel20.py
@@ -152,7 +152,6 @@ def apply(file_path: str, parameters: Optional[Dict[Any, Any]] = None):
         object_changes = object_changes.sort_values([event_timestamp, internal_index])
         del object_changes[internal_index]
 
-    E2O.dropna(inplace=True, subset=[event_id, event_activity, event_timestamp, object_id, object_type])
     ocel = OCEL(events=event_types_coll, objects=objects, relations=E2O, object_changes=object_changes, o2o=O2O, parameters=parameters)
     ocel = ocel_consistency.apply(ocel, parameters=parameters)
     ocel = filtering_utils.propagate_relations_filtering(ocel, parameters=parameters)
diff --git a/pm4py/objects/ocel/util/filtering_utils.py b/pm4py/objects/ocel/util/filtering_utils.py
index c0a93941d..8f5f8f74f 100644
--- a/pm4py/objects/ocel/util/filtering_utils.py
+++ b/pm4py/objects/ocel/util/filtering_utils.py
@@ -131,10 +131,12 @@ def propagate_relations_filtering(ocel: OCEL, parameters: Optional[Dict[Any, Any
     event_id = exec_utils.get_param_value(Parameters.EVENT_ID, parameters, ocel.event_id_column)
     object_id = exec_utils.get_param_value(Parameters.OBJECT_ID, parameters, ocel.object_id_column)
 
-    selected_event_ids = set(ocel.relations[event_id].unique())
-    selected_object_ids = set(ocel.relations[object_id].unique())
+    selected_event_ids = set(ocel.relations[event_id].unique()).intersection(set(ocel.events[event_id].unique()))
+    selected_object_ids = set(ocel.relations[object_id].unique()).intersection(set(ocel.objects[object_id].unique()))
     ocel.events = ocel.events[ocel.events[event_id].isin(selected_event_ids)]
     ocel.objects = ocel.objects[ocel.objects[object_id].isin(selected_object_ids)]
+    ocel.relations = ocel.relations[ocel.relations[event_id].isin(selected_event_ids)]
+    ocel.relations = ocel.relations[ocel.relations[object_id].isin(selected_object_ids)]
 
     ocel.e2e = ocel.e2e[(ocel.e2e[event_id].isin(selected_event_ids)) & (ocel.e2e[event_id+"_2"].isin(selected_event_ids))]
     ocel.o2o = ocel.o2o[(ocel.o2o[object_id].isin(selected_object_ids)) & (ocel.o2o[object_id+"_2"].isin(selected_object_ids))]
diff --git a/pm4py/objects/ocel/util/ocel_consistency.py b/pm4py/objects/ocel/util/ocel_consistency.py
index 9f071b5c0..009bc6d80 100644
--- a/pm4py/objects/ocel/util/ocel_consistency.py
+++ b/pm4py/objects/ocel/util/ocel_consistency.py
@@ -51,8 +51,10 @@ def apply(ocel: OCEL, parameters: Optional[Dict[Any, Any]] = None) -> OCEL:
     for tab in fields:
         df = getattr(ocel, tab)
         for fie in fields[tab]:
-            df.dropna(subset=[fie], how="any", inplace=True)
+            df = df.dropna(subset=[fie], how="any")
             df[fie] = df[fie].astype("string")
+            df = df.dropna(subset=[fie], how="any")
             df = df[df[fie].str.len() > 0]
+            setattr(ocel, tab, df)
 
     return ocel
diff --git a/requirements.txt b/requirements.txt
index 11c4063a8..572504ccd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ lxml
 matplotlib
 networkx
 numpy
-pandas<=2.0.3
+pandas
 pydotplus
 pytz
 scipy
diff --git a/requirements_complete.txt b/requirements_complete.txt
index 79ff9ed03..9235d4ddb 100644
--- a/requirements_complete.txt
+++ b/requirements_complete.txt
@@ -11,7 +11,7 @@ matplotlib
 networkx
 numpy
 packaging
-pandas<=2.0.3
+pandas
 pillow
 pydotplus
 pyparsing