Try this:_inherit = ['mail.thread', 'mail.activity.mixin']
@api.multi
    def write(self, vals):
        for rec in self:
            vals = self._prepare_params_for_update(vals, rec)

            if vals['has_problem']:
                act_type_id = self.env['mail.activity.type'].search(
                    [('name', 'ilike', 'Record Has Problems')], limit=1).id
                self.env['mail.activity'].create({
                    'res_model_id': self.env.ref( < my_model_id > ).id,
                    'res_id': rec.id,
                    'user_id': rec.user_id.id,
                    'activity_type_id': act_type_id,
                    'date_deadline': vals['date_submitted'],
                })
        return super(ChecklistRecord, self).write(vals)