Title: Bug: Undefined array key “old”
Last modified: March 20, 2026

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# Bug: Undefined array key “old”

 *  Resolved [Manuel Camargo](https://wordpress.org/support/users/sirlouen/)
 * (@sirlouen)
 * [2 months, 2 weeks ago](https://wordpress.org/support/topic/undefined-array-key-old/)
 * **Error**: `Warning: Undefined array key "old" in /var/www/html/wp-content/plugins/
   wp-multilang/includes/class-wpm-taxonomies.php on line 289`
 * **Testing Instructions:** The problem is that `update_description` can also be
   called when the insert path set `$this->description` (without the `'old'` key).
   This happens when I create a new term programmatically and WordPress fires both
   the **insert **and **update **hooks.
 * **Conclusion**: Add a null coalescing for this array key `old`:
 * `$this->description['old'] ?? array()`

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [Sanjeev Kumar](https://wordpress.org/support/users/sanjeevsetu/)
 * (@sanjeevsetu)
 * [2 months, 2 weeks ago](https://wordpress.org/support/topic/undefined-array-key-old/#post-18859054)
 * Thanks for the bug report and for providing the solution as well.
 * We have raised a ticket for this issue. Our team will review your solution and
   include it in one of the upcoming updates if applicable.
 * GitHub Ticket Reference:
   [https://github.com/ahmedkaludi/wp-multilang/issues/248](https://github.com/ahmedkaludi/wp-multilang/issues/248)
 *  Thread Starter [Manuel Camargo](https://wordpress.org/support/users/sirlouen/)
 * (@sirlouen)
 * [2 months, 2 weeks ago](https://wordpress.org/support/topic/undefined-array-key-old/#post-18859063)
 * Nice, I did not know you had a repo, I would have post it there directly.

Viewing 2 replies - 1 through 2 (of 2 total)

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 * 2 replies
 * 2 participants
 * Last reply from: [Manuel Camargo](https://wordpress.org/support/users/sirlouen/)
 * Last activity: [2 months, 2 weeks ago](https://wordpress.org/support/topic/undefined-array-key-old/#post-18859063)
 * Status: resolved