diff --git a/aeat.py b/aeat.py
index 58a00e9..885072d 100644
--- a/aeat.py
+++ b/aeat.py
@@ -1351,16 +1351,19 @@ class SIIReportLine(ModelSQL, ModelView):
                     report2.operation_type,
                     with_=[subquery]))
 
-            def compose_key(state, type):
+            def compose_key(sii_state, sii_type):
                 return (
-                    ('sii_state', state),
-                    ('sii_communication_type', type),
+                    ('sii_state', sii_state),
+                    ('sii_communication_type', sii_type),
                 )
 
             for invoice_id, sii_state, operation_type in cursor.fetchall():
                 invoice = invoiceid2record.pop(invoice_id)
                 key = compose_key(sii_state, operation_type)
-                changes.setdefault(key, []).append(invoice)
+                for key_, value in key:
+                    if getattr(invoice, key_, None) != value:
+                        changes.setdefault(key, []).append(invoice)
+                        break
             if invoiceid2record:
                 changes[compose_key(None, None)] = list(
                     invoiceid2record.values())