diff --git a/addons/account_edi/models/account_move.py b/addons/account_edi/models/account_move.py
index fc1bdf414db..69cafa7565e 100644
--- a/addons/account_edi/models/account_move.py
+++ b/addons/account_edi/models/account_move.py
@@ -402,6 +402,12 @@ class AccountMove(models.Model):
     def _get_edi_attachment(self, edi_format):
         return self._get_edi_document(edi_format).sudo().attachment_id
 
+    # this override is to make sure that the main attachment is not the edi xml otherwise the attachment viewer will not work correctly
+    def _message_set_main_attachment_id(self, attachment_ids):
+        if self.message_main_attachment_id and len(attachment_ids) > 1 and self.message_main_attachment_id in self.edi_document_ids.attachment_id:
+            self.message_main_attachment_id = self.env['ir.attachment']
+        super()._message_set_main_attachment_id(attachment_ids)
+
     ####################################################
     # Business operations
     ####################################################