TYPO3 Core

Executing Database analyzer ("Compare current database with specification") ends in a loop (caused by the extension "ke_stats"). It is a Typo3 6.2 (initial installation was 6.0, then updated to 6.1)

There are two tasks (see also snapshots):

• ALTER TABLE tx_kestats_cache DROP KEY whereclause_index;
• ALTER TABLE tx_kestats_cache ADD KEY whereclause_index (whereclause(260),orderby(20),groupby(20));

Performing (snapshot 1) the first works (it isn't displayed any more, snapshot 2), but after performing the second both tasks are displayed again (snapshot 3).
I performed it several times, it is always the same, it is an infinite loop.

Because of this I cannot finish the Upgrade Wizard.

content of the ext_tables.sql

#
# Table structure for table 'tx_kestats_statdata'
#
CREATE TABLE tx_kestats_statdata (
        uid int(11) NOT NULL auto_increment,
        pid int(11) DEFAULT '0' NOT NULL,
        tstamp int(11) DEFAULT '0' NOT NULL,
        crdate int(11) DEFAULT '0' NOT NULL,
        cruser_id int(11) DEFAULT '0' NOT NULL,
        type tinytext NOT NULL,
        category tinytext NOT NULL,
        element_uid int(11) DEFAULT '0' NOT NULL,
        element_pid int(11) DEFAULT '0' NOT NULL,
        element_title tinytext NOT NULL,
        element_language int(11) DEFAULT '0' NOT NULL,
        element_type int(11) DEFAULT '0' NOT NULL,
        counter int(11) DEFAULT '0' NOT NULL,
        year int(11) DEFAULT '0' NOT NULL,
        month int(11) DEFAULT '0' NOT NULL,
        parent_uid int(11) DEFAULT '0' NOT NULL,

        PRIMARY KEY (uid),
        KEY parent (pid),
        KEY index1 (type(20),category(20),element_title(20),year,month),
        KEY index2 (type(20),category(20),element_uid,element_language,element_type,year,month),
        KEY index3 (element_title(20)),
        KEY index4 (type(20),category(20),element_uid,element_pid,element_language,element_type,year,month),
        KEY index5 (type(20),tstamp)
);

#
# Table structure for table 'tx_kestats_cache'
#
CREATE TABLE tx_kestats_cache (
        uid int(11) NOT NULL auto_increment,
        whereclause text NOT NULL,
        orderby text NOT NULL,
        groupby text NOT NULL,
        result longtext NOT NULL,
        PRIMARY KEY (uid),
        KEY whereclause_index (whereclause(260),orderby(20),groupby(20))
);

#
# Table structure for table 'tx_kestats_queue'
#
CREATE TABLE tx_kestats_queue (
        uid int(11) NOT NULL auto_increment,
        tstamp int(11) DEFAULT '0' NOT NULL,
        data text NOT NULL,
        generaldata text NOT NULL,

        PRIMARY KEY (uid)
);