Warning: [mysql error 144] Table './piwigo_sozialmarkt/piwigo_sessions' is marked as crashed and last (automatic?) repair failed

SELECT data
  FROM piwigo_sessions
  WHERE id = 'C0A8u35jktrck07tnrhl65p679pke6'
; in /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/include/dblayer/functions_mysqli.inc.php on line 845

Call Stack:
    0.0009     780576   1. {main}() /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/index.php:0
    0.0013     917864   2. include_once('/var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/include/common.inc.php') /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/index.php:26
    0.0175    5934008   3. session_start() /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/include/common.inc.php:149
    0.0175    5934832   4. pwg_session_read() /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/include/functions_session.inc.php:0
    0.0175    5935048   5. pwg_query() /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/include/functions_session.inc.php:147
    0.0177    5935208   6. my_error() /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/include/dblayer/functions_mysqli.inc.php:147
    0.0177    5935704   7. trigger_error() /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/include/dblayer/functions_mysqli.inc.php:845

Warning: [mysql error 144] Table './piwigo_sozialmarkt/piwigo_history' is marked as crashed and last (automatic?) repair failed

INSERT INTO piwigo_history
  (
    date,
    time,
    user_id,
    IP,
    section,
    category_id,
    image_id,
    image_type,
    format_id,
    auth_key_id,
    tag_ids
  )
  VALUES
  (
    CURRENT_DATE,
    CURRENT_TIME,
    2,
    '192.168.0.254',
    'categories',
    NULL,
    NULL,
    NULL,
    NULL,
    NULL,
    NULL
  )
; in /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/include/dblayer/functions_mysqli.inc.php on line 845

Call Stack:
    0.0009     780576   1. {main}() /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/index.php:0
    0.0399    8890144   2. pwg_log() /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/index.php:370
    0.0399    8892240   3. pwg_query() /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/include/functions.inc.php:478
    0.0402    8892400   4. my_error() /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/include/dblayer/functions_mysqli.inc.php:147
    0.0402    8893152   5. trigger_error() /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/include/dblayer/functions_mysqli.inc.php:845

Warning: [mysql error 144] Table './piwigo_sozialmarkt/piwigo_sessions' is marked as crashed and last (automatic?) repair failed

REPLACE INTO piwigo_sessions
  (id,data,expiration)
  VALUES('C0A8u35jktrck07tnrhl65p679pke6','pwg_device|s:7:\"desktop\";pwg_mobile_theme|b:0;',now())
; in /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/include/dblayer/functions_mysqli.inc.php on line 845

Call Stack:
    0.0415    8793688   1. pwg_session_write() /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/include/functions_session.inc.php:0
    0.0416    8793976   2. pwg_query() /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/include/functions_session.inc.php:173
    0.0417    8794136   3. my_error() /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/include/dblayer/functions_mysqli.inc.php:147
    0.0417    8794704   4. trigger_error() /var/www/friecom.net/public_html/piwig/sozialmarkt/piwigo/include/dblayer/functions_mysqli.inc.php:845