wp-config.php write error

Please remove the

> wp-config.php operation failed when changing `WP_CACHE` const: File public_html/wp-config.php is not writable.

error message if the WP_CACHE variable is already defined, something like this:

`
if(defined('WP_CACHE') && WP_CACHE){
return true;
}
`

In the end, it looks like Litespeed cache plugin 3+ version does not use the advanced-cache.php file and here is the description for WP_CACHE varaible.

> The WP_CACHE setting, if true, includes the wp-content/advanced-cache.php script, when executing wp-settings.php.

Start by locating the code that changes public_html/wp-config.php and handles the WP_CACHE setting. Check how an already-defined WP_CACHE value is handled, then verify that this case no longer reports the wp-config.php write error while other write failures still do.

Written by the indexing model from the issue text.