diff --git a/sao/src/model.js b/sao/src/model.js
index 8e5b8dca2b9..8f5901c3c6e 100644
--- a/sao/src/model.js
+++ b/sao/src/model.js
@@ -2390,7 +2390,9 @@
                     }
                 }
                 // Trigger modified only once
-                group.record_modified();
+                if (modified || default_) {
+                    group.record_modified();
+                }
             }
         },
         set: function(record, value, data=null, _default=false) {
diff --git a/tryton/tryton/gui/window/view_form/model/field.py b/tryton/tryton/gui/window/view_form/model/field.py
index 70e5266d13a..9e1b6adf624 100644
--- a/tryton/tryton/gui/window/view_form/model/field.py
+++ b/tryton/tryton/gui/window/view_form/model/field.py
@@ -794,7 +794,8 @@ def _set_value(
                     new_record.set(vals, modified=False)
                     group.append(new_record)
             # Trigger modified only once
-            group.record_modified()
+            if modified or default:
+                group.record_modified()
 
     def set(self, record, value, data=None, _default=False):
         group = record.value.get(self.name)