Discuz! Database Error

SQL:CREATE TABLE pre_ucenter_applications ( appid smallint(6) unsigned NOT NULL auto_increment, `type` varchar(16) NOT NULL default '', `name` varchar(20) NOT NULL default '', url varchar(255) NOT NULL default '', authkey varchar(255) NOT NULL default '', ip varchar(45) NOT NULL default '', viewprourl varchar(255) NOT NULL, apifilename varchar( 30 ) NOT NULL DEFAULT 'uc.php', charset varchar(8) NOT NULL default '', dbcharset varchar(8) NOT NULL default '', synlogin tinyint(1) NOT NULL default '0', recvnote tinyint(1) DEFAULT '0', extra text NOT NULL, tagtemplates text NOT NULL, allowips text NOT NULL, PRIMARY KEY (appid)) ENGINE=INNODB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
Error:Tablespace '`dongying`.`pre_ucenter_applications`' exists.
Errno:1813

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