Title: cache Key Errors
Last modified: October 7, 2026

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# cache Key Errors

 *  [wynot](https://wordpress.org/support/users/wynot/)
 * (@wynot)
 * [4 days, 4 hours ago](https://wordpress.org/support/topic/cache-key-errors/)
 * Hello – I’ve been getting a lot of the following errors logging in my debug log:
 * [07-Oct-2026 16:36:18 UTC] objectcache.notice: The cache key `font-awesome-last-
   used-release` is incompatible with prefetching and the group `transient` should
   be added to the list of non-prefetchable groups. For more information see: [https://objectcache.pro/docs/configuration-options/#non-prefetchable-groups](https://objectcache.pro/docs/configuration-options/#non-prefetchable-groups)
 * Version 5.2.1
 * WP v7.1.2
 * Can you help resolve this as it’s filling up our log file.
 * Thank you!
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fcache-key-errors%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

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 * 0 replies
 * 1 participant
 * Last reply from: [wynot](https://wordpress.org/support/users/wynot/)
 * Last activity: [4 days, 4 hours ago](https://wordpress.org/support/topic/cache-key-errors/)
 * Status: not resolved