Add or delete one or more people in an already existing list

Hello !

I’m making a time management app. The names come from one database (via airtable) and the needs from another (besoin). I filled in a third database to make a timetable with position, time and need (EDT) criteria. I make the selection via a pop up by filling in a state and doing 5 workflows to fill the database.

But I would like to be able to modify the lists if necessary via the pop up. However, I can’t put the information back in the state (since the original state is linked to the imported database and not to the EDT database) and therefore delete them if necessary. I’ve been looking for a solution for several days but I can’t find the solution. Do you have an idea ?

Thanks in advance.