Merge pull request #4445 from nhsuk/fix-migration-session-date-id

Fix migration on pre-screenings

Author: thomasleese

db/migrate/20250821124416_remove_patient_session_from_pre_screenings.rb

@@ -15,7 +15,7 @@ def up
         SessionDate.find_by!(
           session_id:,
           value: pre_screening.created_at.to_date
-        )
+        ).id
       pre_screening.update_columns(patient_id:, session_date_id:)
     end