I looked in the log file and found the code below.
Is the hacking attempt correct?
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[21-Oct-2022 23:06:07 Asia/Seoul] PHP Fatal error: Uncaught Exception: SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'userID' cannot be null<br>
<br>
Query-Code:REPLACE INTO uni1_session SET
sessionID = ,
userID= ,
lastonline = 1666361167,
userIP= 211.176.125.70; in /www_root/includes/classes/Database.class.php:126
Stack trace:
#0 /www_root/includes/classes/Database.class.php(169): Database->_query('REPLACE INTO un...', Array, 'replace')
#1 /www_root/includes/classes/Session.class.php(227): Database->replace('REPLACE INTO %%...', Array)
#2 /www_root/chat/lib/class/CustomAJAXChat.php(29): Session->save()
#3 [internal function]: CustomAJAXChat->__destruct()
#4 {main}
thrown in /www_root/includes/classes/Database.class.php on line 126