[BUG] Enable editing allowlist on blueprint

### What is it?

 When I click on “Edit allowlist” from a blueprint, then I can’t actually edit the current allowlist, but only replace it

https://www.loom.com/share/ba37edae82f64b7580b8d49e59f45b21?sid=b7f30e49-1781-4847-b139-2cc600bed9f3