diff --git a/epyqlib/pm/parametermodel.py b/epyqlib/pm/parametermodel.py
index 0a333e2f..e1ba2a92 100644
--- a/epyqlib/pm/parametermodel.py
+++ b/epyqlib/pm/parametermodel.py
@@ -310,13 +310,6 @@ class Group(epyqlib.treenode.TreeNode):
             field=marshmallow.fields.String(allow_none=True),
         ),
     )
-    comment = attr.ib(
-        default=None,
-        converter=epyqlib.attrsmodel.to_str_or_none,
-        metadata=graham.create_metadata(
-            field=marshmallow.fields.String(allow_none=True),
-        ),
-    )
     children = attr.ib(
         default=attr.Factory(list),
         cmp=False,
@@ -564,13 +557,6 @@ class ArrayGroupElement(epyqlib.treenode.TreeNode):
             field=marshmallow.fields.String(),
         ),
     )
-    comment = attr.ib(
-        default=None,
-        converter=epyqlib.attrsmodel.to_str_or_none,
-        metadata=graham.create_metadata(
-            field=marshmallow.fields.String(allow_none=True),
-        ),
-    )
     uuid = epyqlib.attrsmodel.attr_uuid()
     original = attr.ib(
         default=None,