rubocop
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 ## master (unreleased)
 
+### Bug fixes
+
+* [#1021](https://github.com/rubocop/rubocop-rails/pull/1021): Fix an error for `Rails/UniqueValidationWithoutIndex`. ([@ydah][])
+
 ## 2.20.0 (2023-06-18)
 
 ### New features