Redis cache write return false

After upgrading the redis version in order to upgrade to sidekiq version 7. Whenever I try to write to the cache it returns false. But sidekiq works correctly.

Sidekiq 7.0.0redis gem 5.0.5redis 7.0.5

3.1.1 :003 > Rails.cache => #<ActiveSupport::Cache::RedisCacheStore options={:namespace=>nil, :compress=>true, :compress_threshold=>1024, :expires_in=>nil, :race_condition_ttl=>nil} redis=#<Redis client v5.0.5 for redis://127.0.0.1:6379/0>> 3.1.1 :005 > Rails.cache.write 'test', 'test' => false 

EDIT:

Solved.The problem was in the new redis.conf file that was generated when upgrading.