in the Character Creation Tables in Xanathar's Guide to Everything, there is a typo in the Birth Order section:

https://www.dndbeyond.com/sources/xgte/character-options-this-is-your-life#BirthOrder

Upon inspection, you will notice a distinct lack of a Result for rolling a 1 on the Birth Order:

Birth Order

2d6	Birth Order
2	Twin, triplet, or quadruplet
3–7	Older
8–12	Younger

As you can see.

I know it is a small bug, but it is paid content, and I felt such an oversight should be reported so it could be addressed.

Hello Blue64!

As the table requires you to roll 2d6, it is not possible to roll a 1.

Keep that sharp eye out, though! :)