Update variable name

Author: yzhoubk

db/migrate/20250930230620_update_fix_term_item_relation.rb

@@ -1,8 +1,8 @@
 class UpdateFixTermItemRelation < ActiveRecord::Migration[7.0]
   def up
     after_1999_id = select_value("SELECT id FROM terms WHERE value = 'After 1999'")
-    after_2000_id = select_value("SELECT id FROM terms WHERE value = 'After 2020'")
-    return unless after_1999_id && after_2000_id
+    after_2020_id = select_value("SELECT id FROM terms WHERE value = 'After 2020'")
+    return unless after_1999_id && after_2020_id
 
     execute <<~SQL.squish
       WITH target AS (
@@ -14,7 +14,7 @@ def up
           AND i.date = '[2020]'
       )
       UPDATE items_terms it
-      SET term_id = #{after_2000_id}
+      SET term_id = #{after_2020_id}
       FROM target
       WHERE it.item_id = target.item_id
       AND it.term_id = target.term_id;
@@ -23,16 +23,16 @@ def up
 
   def down
     after_1999_id = select_value("SELECT id FROM terms WHERE value = 'After 1999'")
-    after_2000_id = select_value("SELECT id FROM terms WHERE value = 'After 2020'")
-    return unless after_1999_id && after_2000_id
+    after_2020_id = select_value("SELECT id FROM terms WHERE value = 'After 2020'")
+    return unless after_1999_id && after_2020_id
 
     execute <<~SQL.squish
       WITH target AS (
         SELECT it.term_id, it.item_id
         FROM items i
         JOIN items_terms it ON i.id = it.item_id
         JOIN terms t ON it.term_id = t.id
-        WHERE t.id = #{after_2000_id}
+        WHERE t.id = #{after_2020_id}
           AND i.date = '[2020]'
       )
       UPDATE items_terms it