[FIX] document_page_approval: Add correct followers in history pages

document_page_approval/models/document_page_history.py

@@ -85,7 +85,7 @@ class DocumentPageHistory(models.Model):
                 users = self.env['res.users'].search([
                     ('groups_id', 'in', guids),
                     ('groups_id', 'in', approver_gid.id)])
-                rec.message_subscribe([u.id for u in users])
+                rec.message_subscribe(partner_ids=users.mapped('partner_id').ids)
                 rec.message_post_with_template(template.id)
             else:
                 # auto-approve if approval is not required