diff --git a/plm/models/ir_attachment.py b/plm/models/ir_attachment.py
index 3fbe278a..632ed892 100755
--- a/plm/models/ir_attachment.py
+++ b/plm/models/ir_attachment.py
@@ -1213,9 +1213,9 @@ def _is_checkout(self):
         for ir_attachment_id in self:
             _docName, _docRev, chekOutUser, _hostName = self.env['ir.attachment'].getCheckedOut(ir_attachment_id.id, None)
             if chekOutUser:
-                ir_attachment_id.is_checkout = True
+                ir_attachment_id.with_context(check=False).is_checkout = True
             else:
-                ir_attachment_id.is_checkout = False
+                ir_attachment_id.with_context(check=False).is_checkout = False
 
     def getFileExtension(self, docBrws):
         fileExtension = ''