diff --git a/themis/importexport/sync.py b/themis/importexport/sync.py
index 5e0cb8d..dd22c25 100644
--- a/themis/importexport/sync.py
+++ b/themis/importexport/sync.py
@@ -272,11 +272,15 @@ class SyncFromThemis(UtilityView):
                          'orateurs_seance_reponse_orale'):
                 speakers = list(set(speakers + (data.get(attr) or [])))
 
+            if not hasattr(object, 'speakers'):
+                object.speakers = []
+
             speakers_intids = [self.get_author_intid(x) for x in speakers]
             object.speakers = self.create_relation_value_list_if_needed(
                     object.speakers, speakers_intids)
 
-            reporters = []
+            if not hasattr(object, 'reporters'):
+                object.reporters = []
             reporters_intids = [self.get_author_intid(x) for x in data.get('rapporteurs') or []]
             object.reporters = self.create_relation_value_list_if_needed(
                     object.reporters, reporters_intids)