diff --git a/activerecord/lib/active_record/model_schema.rb b/activerecord/lib/active_record/model_schema.rb
index 75adcccce6..3674f672cb 100644
--- a/activerecord/lib/active_record/model_schema.rb
+++ b/activerecord/lib/active_record/model_schema.rb
@@ -328,12 +328,8 @@ module ActiveRecord
         @default_attributes = nil
         @inheritance_column = nil unless defined?(@explicit_inheritance_column) && @explicit_inheritance_column
         @attributes_builder = nil
-        @column_names = nil
-        @attribute_types = nil
         @columns = nil
         @columns_hash = nil
-        @content_columns = nil
-        @default_attributes = nil
         @attribute_names = nil
       end