WordPress database error: [Duplicate entry '' for key 'wp_blc_links.url_hash']
ALTER TABLE `wp_blc_links` ADD UNIQUE KEY `url_hash` (`url_hash`)

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Warning: Cannot modify header information - headers already sent by (output started at /home/pontarelli/public_html/wp-includes/class-wpdb.php:1855) in /home/pontarelli/public_html/wp-includes/pluggable.php on line 1538