If you connect several boards, the second will see a resistor of 20k, the third 30k ...
The light produced by LED will decrease with the number of boards.
If I have understood you idea, this is not what you want.
Furthermore, pins 1 and 2 of U2 are shorted. So this will not work at all.
Here is a suggestion:
Single LED Board1.0b.fzz (6.3 KB)