@Saradiamanta Thanks for spotting this. Here's a guide if anyone else wants to change it in the advanced editor.
In the FM24 editor, load Messi's database. On the left side, go to England dropdown menu:
England > Competitions > Add
There you add FA Youth Cup and U21 Division 4 Cup to the already existing list.
Then save, test all rules to re-verify, save again.