Generated migration should not include columns automatically created by create_active_mailer_table

[esquivalient]

create_active_mailer_table automatically makes

    # t.integer   :sender_id
     # t.timestamp :sent_at
     # t.string    :subject

and they're also included in the generated migration. That results in errors like

you can't define an already defined column 'sent_at'.
/Users/esquivalient/Dropbox/code/burndown/db/migrate/20220804162528_create_invite_team_member_emails.rb:8:in `block in change'
/Users/esquivalient/Dropbox/code/burndown/db/migrate/20220804162528_create_invite_team_member_emails.rb:3:in `change'