Export jira tickets
Look at the Extracted Descriptions tab
If any Descriptions are missing:
Get the IDs column (after filtering to Missing IDs)
Go to @Z-Export
Paste in the needed tickets (can't do all of them, Jira bogs down), adding commas.
Hit Search
Hit Export, choose CSV all fields, to filename.csv
Pick @Z-Export tab, go to end, add row if needed, and select first empty row B column
Import filename.csv, replace current cell, comma delimiter
Cut Summary row to column E