Exception class: PDOException()

SQLSTATE[HY000]: General error: 1 Can't create/write to file '/tmp/#sql-temptable-2d8c37-17e3c-1.MAI' (Errcode: 28 "No space left on device")

File: /home/otsmanager/www/myaac/old/system/libs/pot/OTS_Base_DB.php
Line: 86


Backtrace:

#0 /home/otsmanager/www/myaac/old/system/libs/pot/OTS_Base_DB.php(86): PDO->query()
#1 /home/otsmanager/www/myaac/old/system/libs/pot/OTS_DB_PDOQuery_PHP71.php(10): OTS_Base_DB->doQuery()
#2 /home/otsmanager/www/myaac/old/system/libs/pot/OTS_DB_MySQL.php(220): OTS_Base_DB->query()
#3 /home/otsmanager/www/myaac/old/system/libs/pot/OTS_DB_MySQL.php(216): OTS_DB_MySQL->hasColumnInternal()
#4 /home/otsmanager/www/myaac/old/system/init.php(136): OTS_DB_MySQL->hasColumn()
#5 /home/otsmanager/www/myaac/old/index.php(78): require_once('...')
#6 {main}