Public Users Update A Record

[NortheastHQ]

Hello,

So I am trying to make a column where if a user updates their date of birth it will change their date of birth in a different table. The issue I am running into is that when I change the date of birth for any user it just changes the date of birth of the first person's date of birth in the second table.

How do I make it so that if a user puts in their date of birth it will change onto the other table on the line specific to where their name is?