You get more information about the problem in our knowledge base:
Information:
error message: Invalid SQL: INSERT INTO wcf1_session
(sessionID, packageID, userID, ipAddress, userAgent,
lastActivityTime, requestURI, requestMethod,
username)
VALUES ('e07d66f03da12bd26175d23275b1a6926000a53d',
48,
0,
'193.154.15.237',
'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0',
1383673403,
'/index.php',
'GET',
''
)
error code: 1114
Heute bereits mehrmals! 
baer
