Settled status issue date problems?

I'm applying for student finance and as I'm a Spanish national, who has lived in England since 1999, I've chosen the "settled status" option.

However when it asks me to add in the date that my settled status was issued, it says "You need to enter a date that comes on or after 5 April 2006". The problem is that my date was 2 years prior to this.

What do I put as the date?