Issue
You want to know what changes you must make for the upcoming changes to REDIS_URL.
Resolution
We deprecated the REDIS_TLS_URL and REDIS_TEMPORARY_URL config vars, and started removing these config vars on December 4, 2024. All Key-Value Store add-ons require secure TLS connections using the REDIS_URL config var. See Connecting to Heroku Key-Value Store on how to connect with TLS.