Title: Can’t install 1.5
Last modified: August 18, 2016

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# Can’t install 1.5

 *  [marko](https://wordpress.org/support/users/marko/)
 * (@marko)
 * [21 years, 3 months ago](https://wordpress.org/support/topic/cant-install-15/)
 * hi,
    I had 1.2 installed but only had a couple of posts that were not important,
   so I cleared the database and deleted all the files. Uploaded the new 1.5 files
   etc, and ran install.php and this is what I got: Fatal error: Cannot redeclare
   get_author_rss_link() (previously declared in /home/httpd/vhosts/aussiediary.
   com/httpdocs/wp-includes/template-functions-author.php:99) in /home/httpd/vhosts/
   aussiediary.com/httpdocs/wp-includes/feed-functions.php on line 88

Viewing 4 replies - 1 through 4 (of 4 total)

 *  [oriecat](https://wordpress.org/support/users/oriecat/)
 * (@oriecat)
 * [21 years, 3 months ago](https://wordpress.org/support/topic/cant-install-15/#post-147089)
 * Did you try running the upgrade instead?
 *  Moderator [James Huff](https://wordpress.org/support/users/macmanx/)
 * (@macmanx)
 * [21 years, 3 months ago](https://wordpress.org/support/topic/cant-install-15/#post-147108)
 * Yes, you need to run upgrade.php, not install.php. You are upgrading, not installing.
 * [http://www.tamba2.org.uk/wordpress/upgrade/](http://www.tamba2.org.uk/wordpress/upgrade/)
 *  [rustindy](https://wordpress.org/support/users/rustindy/)
 * (@rustindy)
 * [21 years, 3 months ago](https://wordpress.org/support/topic/cant-install-15/#post-147127)
 * If you delete all the tables from the database, then you are installing 🙂 But
   from the sound of it, you deleted only the records and left the tables intact,
   so you are technically upgrading.
 *  [tombarnett](https://wordpress.org/support/users/tombarnett/)
 * (@tombarnett)
 * [21 years, 3 months ago](https://wordpress.org/support/topic/cant-install-15/#post-147136)
 * One idea, if this is a fresh install, might just be to change the prefix for 
   the new database tables? so, wp1_ or something (done in wp-config.php). Unless
   you’re struggling for disk space, then that’s the quick and perhaps cheating 
   option.

Viewing 4 replies - 1 through 4 (of 4 total)

The topic ‘Can’t install 1.5’ is closed to new replies.

 * In: [Installing WordPress](https://wordpress.org/support/forum/installation/)
 * 4 replies
 * 5 participants
 * Last reply from: [tombarnett](https://wordpress.org/support/users/tombarnett/)
 * Last activity: [21 years, 3 months ago](https://wordpress.org/support/topic/cant-install-15/#post-147136)
 * Status: not resolved

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