WordPress database error: [Duplicate key name 'last_check_attempt']
ALTER TABLE `wp_blc_links` ADD KEY `last_check_attempt` (`last_check_attempt`)

WordPress database error: [Duplicate key name 'may_recheck']
ALTER TABLE `wp_blc_links` ADD KEY `may_recheck` (`may_recheck`)

WordPress database error: [Duplicate key name 'check_count']
ALTER TABLE `wp_blc_links` ADD KEY `check_count` (`check_count`)