Sovereign 2017 - Struck On The Day - Garter Type - Plain Edge

Dear all,
As far as I was able to look in the coin catalogue the following coins appears to be missing.
1 Sovereign 2017 Struck On The Day - Garter Type - Plain Edge - BU - Mintage 1,817.
https://www.royalmint.com/sovereign/specialist-sovereigns/The-Sovereign-2017-Strike-on-the-Day-Anniversary-Piece/
I tried to add that version in the following catalogue item: https://en.numista.com/catalogue/pieces102243.html but I am not able to do that.
Thanks

Thank you, the year list has been unlocked so you should now be able to submit a modification request.

Thank you for your reply. I have just amended the coin page.