confused about installation instructions

Hello,

In your readme.txt file, you say:

“Copy the file object-cache.php of this Plugin into your /wp-content/ directory. Note that this file needs to be stored directly into your content directory and not under the plugins directory.”

Do you mean to move or copy? Because when I copy that file, and leave the original in the plugins directory, I get this error when activating the plugin:

“Fatal error: Cannot redeclare wp_cache_add() in /var/www/vhosts/laserlightshows.us/httpdocs/wp-content/plugins/xcache/object-cache.php on line 12”

But, if I move the file, there is no plugin to activate. Can you please clarify this a little for me?

Thanks!

https://www.ads-software.com/extend/plugins/xcache/