Title: Error in php log
Last modified: March 14, 2020

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# Error in php log

 *  [JJNW](https://wordpress.org/support/users/jjnw/)
 * (@jjnw)
 * [6 years, 3 months ago](https://wordpress.org/support/topic/error-in-php-log-5/)
 * Hello.
 * I got this error in the php log on my localhost (WAMP64).
 * Any suggestions? I didn’t see it on my live site, but not certain if its an issue.
 * `WordPress database error Illegal mix of collations (utf8mb4_0900_ai_ci,IMPLICIT)
   and (utf8mb4_unicode_520_ci,IMPLICIT) for operation '=' for query DELETE FROM
   comment_notifier WHERE email NOT IN ( SELECT comment_author_email FROM comments)
   made by activate_plugin, do_action('activate_comment-notifier-no-spammers/comment-
   notifier-no-spammers.php'), WP_Hook->do_action, WP_Hook->apply_filters, lstc_activate,
   lstc_cleanup_prior`
 * Thank you so much!
 * PS the plugin seems to be working flawlessly on live site.

The topic ‘Error in php log’ is closed to new replies.

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 * 0 replies
 * 1 participant
 * Last reply from: [JJNW](https://wordpress.org/support/users/jjnw/)
 * Last activity: [6 years, 3 months ago](https://wordpress.org/support/topic/error-in-php-log-5/)
 * Status: not resolved