Adding unaligned.fasta files from new taxa to existing dataset

[hutumpyancha]

Hi Dr. Faircloth.
I have an existing dataset of UCE data but I want to add UCE data from another project to my dataset. I have the exploded fasta files - ualigned.fasta for an additional 5 taxa. I have added these unaligned.fasta files to my existing folder of exploded fastas which has 52 taxa. From this point, I am unable to create the all-taxa-incomplete.fasta file for all the 57 taxa (52 original taxa + % new taxa) , so that I can proceed to the alignment steps. Or is there a way to directly create the alignment without creating the all-taxa-incomplete.fasta file ?
I will greatly appreciate your assistance with this,
Upasana