Bonjour @claude_richard !
The table is not mandatory but it adds tremendous benefit to anyone reading your post as it shows the history of your star photo of star video.
One possibility is to sign into the T100 system for the leaderboards but you can also create and maintain this table manually and in that case you can leave the ID out or include a sequential number of your choosing (e.g. 1,2,3,4 etc).
Using the T100 system, once you reach level 10 in the T100 system (not the same as the Level 10 for Local Guides!), you can easily generate the table under “VIP Lounge”:
The best place to start to find out more about the leaderboards is at How to read and join the Leaderboards which has links to all the current leaderboards and related posts on Connect. You will also see the Register link (https://forms.gle/Xpkxu5W7Ere1tSKWA) there.
The ID is generated and used internally by the T100 system and we can only see it by generating the table as described above. It is only part of the table to enable problem determination.
See also @PrasadVR’s article Top 100 Local Guides Leaderboards System New feature: Star Views History Table (Version #1)
Also, @AdamGT has indicated that new features are planned to enhance and make this table even better and we hope to see these soon.
P.S.
Not true 
. I just was curious and scrolled down: not everybody, but many (the majority?) did include the table.