Bukkit

What steps will reproduce the problem?
1. Enable hook_vanishnopacket
2. Restart server

What is the expected output? What do you see instead?
Create table stats_hook_vanish

What version of the product are you using?
latest

Do you have an error log of what happened? (Portal: check cache/error.txt)
CREATE TABLE IF NOT EXISTS `statistics`.`stats_hook_vanish` (
  `player_id` INT NOT NULL ,
  `is_vanished` TINYINT(1) NOT NULL DEFAULT 0 ,
  PRIMARY KEY (`player_id`) ,
  CONSTRAINT `stats_fk_player_id20`
    FOREIGN KEY (`player_id` )
    REFERENCES `statistics`.`stats_players` (`player_id` )
    ON DELETE CASCADE
    ON UPDATE NO ACTION);

/* Ошибка SQL (1005): Can't create table 'statistics.stats_hook_vanish' (errno: 121)

Duplicate key on write or update */

Please provide any additional information below. (Plugin/Portal Version, Server Version, PHP Version. MySQL Version)

Solution:
Change foreign key name to 'stats_fk_player_id22' or nextone...
'stats_fk_player_id20' conflicts with stats_player_locations table