PgAdmin 4: Cannot edit rows from one table

Question

Something strange is happening with my new created tables in Postgres, I can add data to them, but I cannot use PgAdmin to edit the any row.

This is my table columns description:

After executing the query to view all table rows this is what I can see:

Save button is disabled to update my table rows. But this is happening only with my new created tables, as you can see, I have other tables where I'm able to edit rows, for example at this table of Users:

Answer 1

Found the problem! That was happening, because I didn't select any of the columns as 'Primary key':

Answer 2

My issue was that I was doing a join and pgAdmin didn't like that. I had to query the table directly.