Refresh fields from Database

Good evening,
I have a little issue ...
1 - I created a form with a dropdown: MyKey ("Equipe #")[file=10232]1.png[/file]
2 - When I change the valu1.pnge of the MyKey, I refresh the others fields from Database.
​[file=10233]2.png[/file]
3 - If I change the value of another field (ex. Logo) from "000" to "555" and submit the form (click on "Valider" button), I save all data in Database
​[file=10234]3.png[/file]
4 - The data base is updated, I checked.
​[file=10235]4.png[/file]
5 - If I reload the form and reload the data from MyKey (the same)then the field Logo is unchanged ("3") !!
​[file=10236]5.png[/file]
6 - But If I open before the database from your data tables interface and close it then that works well !
​[file=10237]6.png[/file]
​
Other point: With the 1st key of the dropdown (MyKey) that works well.
​
​[file=10238]0.png[/file]
Could you help us on that problem, please ?