diff --git a/drf_writable_nested/__init__.py b/drf_writable_nested/__init__.py
index ca0b55c..d3b8bb4 100644
--- a/drf_writable_nested/__init__.py
+++ b/drf_writable_nested/__init__.py
@@ -1,5 +1,5 @@
 __title__ = 'DRF writable nested'
-__version__ = '0.6.3'
+__version__ = '0.6.4'
 __author__ = 'beda.software'
 __license__ = 'BSD 2-Clause'
 __copyright__ = 'Copyright 2014-2020 beda.software'
diff --git a/drf_writable_nested/mixins.py b/drf_writable_nested/mixins.py
index d3dc4c4..b75258d 100644
--- a/drf_writable_nested/mixins.py
+++ b/drf_writable_nested/mixins.py
@@ -185,6 +185,10 @@ def update_or_create_reverse_relations(self, instance, reverse_relations):
                 try:
                     serializer.is_valid(raise_exception=True)
                     related_instance = serializer.save(**save_kwargs)
+                    if not hasattr(self, 'nodelete_pks'):
+                        self.nodelete_pks = {}
+                    self.nodelete_pks[field_name] = self.nodelete_pks.get(field_name, [])
+                    self.nodelete_pks[field_name].append(related_instance.pk)
                     data['pk'] = related_instance.pk
                     new_related_instances.append(related_instance)
                     errors.append({})
@@ -329,7 +333,13 @@ def delete_reverse_relations_if_need(self, instance, reverse_relations):
                     related_field.name: instance,
                 }
 
-            current_ids = self._extract_related_pks(field, related_data)
+            if not hasattr(self, 'nodelete_pks'):
+                current_ids = self._extract_related_pks(field, related_data)
+            else:
+                current_ids = self.nodelete_pks.get(
+                    field_name, 
+                    self._extract_related_pks(field, related_data)
+                )
 
             try:
                 pks_to_delete = list(