Revert "fix review request constraint"

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2023_05_04_002009) do
+ActiveRecord::Schema[7.0].define(version: 2022_08_05_233401) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
 
@@ -110,7 +110,7 @@ ActiveRecord::Schema[7.0].define(version: 2023_05_04_002009) do
   end
 
   create_table "review_requests", force: :cascade do |t|
-    t.string "answered", null: false
+    t.string "answered"
     t.bigint "question_id", null: false
     t.bigint "user_id", null: false
     t.datetime "created_at", null: false