Forum läuft wieder rund

Gerade heute habe ich -nach Abmeldung- folgende Anzeige:

Fatal error: Invalid SQL: INSERT INTO wcf1_session
(sessionID, packageID, userID, ipAddress, userAgent,
lastActivityTime, requestURI, requestMethod,
username)
VALUES ('15051386758f83e653c039260428a455e7dd0cb3',
48,
0,
'79.210.249.147',
'Mozilla/5.0 (Windows NT 10.0; WOW64; rv:41.0) Gecko/20100101 Firefox/41.0',
1443698956,
'/index.php?page=Index',
'GET',
''
)

You get more information about the problem in our knowledge base: http://www.woltlab.com/help/?code=1114

Information:

error message: Invalid SQL: INSERT INTO wcf1_session
(sessionID, packageID, userID, ipAddress, userAgent,
lastActivityTime, requestURI, requestMethod,
username)
VALUES ('15051386758f83e653c039260428a455e7dd0cb3',
48,
0,
'79.210.249.147',
'Mozilla/5.0 (Windows NT 10.0; WOW64; rv:41.0) Gecko/20100101 Firefox/41.0',
1443698956,
'/index.php?page=Index',
'GET',
''
)

error code: 1114

sql type: MySQLDatabase
sql error: The table 'wcf1_session' is full
sql error number: 1114
sql version:
file: /var/www/web0/html/diabetesforum/wcf/lib/system/database/MySQLDatabase.class.php (118)

php version: 5.3.3-7+squeeze14

wcf version: 1.1.10 pl 1 (Tempest)

date: Thu, 01 Oct 2015 11:29:16 +0000

request: /index.php?page=Index

referer:

Stacktrace:

#0 /var/www/web0/html/diabetesforum/wcf/lib/system/session/CookieSessionFactory.class.php(78): MySQLDatabase->sendQuery('INSERT INTO ?wc...')
#1 /var/www/web0/html/diabetesforum/wcf/lib/system/session/SessionFactory.class.php(73): CookieSessionFactory->create()
#2 /var/www/web0/html/diabetesforum/lib/system/WBBCore.class.php(200): SessionFactory->get()
#3 /var/www/web0/html/diabetesforum/wcf/lib/system/WCF.class.php(98): WBBCore->initSession()
#4 /var/www/web0/html/diabetesforum/global.php(18): WCF->__construct()
#5 /var/www/web0/html/diabetesforum/index.php(7): require_once('/var/www/web0/h...')
#6 {main}