Changing event contact does not change contact in agenda list

[operakadabra]

Bug

Changing event contact does not change contact in agenda list

Environment

• Version: 7.0.3
• OS: Linux too 4.15.0-29-generic Fix: Can use POS module with several concurrent users. This also remove temporary table. #31~16.04.1-Ubuntu SMP Wed Jul 18 08:54:04 UTC 2018 x86_64
• Web server: Apache/2.4.18 (Ubuntu)
• PHP: 7.0.30-0ubuntu0.16.04.1
• Database: MySQL or MariaDB 5.7.22-0ubuntu0.16.04.1
• URL(s): http://localhost/dolibarr/htdocs/comm/action/list.php?&filtert=1&showbirthday=1&&maxprint=3&year=2018&month=07

Expected and actual behavior

Changing event related contact does not change contact in agenda list

Steps to reproduce the behavior

Create third party with "contact 1" and "contact 2"
Create "event with contact 1" with "contact 1" as related contact
Save event
Modify the event, click "x" next to related contact "contact 1" to delete it, and add "contact 2" instead
Saving event shows "contact 2" correctly as related contact but when you go to agenda "list view" it still shows as "contact 1"