An error occured in a database query!

Context:
File/tiki/index.php
Url/tiki/index.php
Query:
insert into `tiki_sessions`(`sessionId`,`timestamp`,`user`) values(?,?,?)
Values:
051210693cfbd5fa7f936a25ed36fddb5
11438137282
2
array(4) {
  [0]=>
  array(6) {
    ["file"]=>
    string(43) "/web/techfinesse/web/tiki/lib/tikidblib.php"
    ["line"]=>
    int(84)
    ["function"]=>
    string(9) "sql_error"
    ["class"]=>
    string(7) "tikilib"
    ["type"]=>
    string(2) "->"
    ["args"]=>
    array(3) {
      [0]=>
      &string(73) "insert into `tiki_sessions`(`sessionId`,`timestamp`,`user`) values(?,?,?)"
      [1]=>
      &array(3) {
        [0]=>
        string(32) "51210693cfbd5fa7f936a25ed36fddb5"
        [1]=>
        int(1438137282)
        [2]=>
        NULL
      }
      [2]=>
      &bool(false)
    }
  }
  [1]=>
  array(6) {
    ["file"]=>
    string(41) "/web/techfinesse/web/tiki/lib/tikilib.php"
    ["line"]=>
    int(2462)
    ["function"]=>
    string(5) "query"
    ["class"]=>
    string(7) "tikilib"
    ["type"]=>
    string(2) "->"
    ["args"]=>
    array(2) {
      [0]=>
      &string(73) "insert into `tiki_sessions`(`sessionId`,`timestamp`,`user`) values(?,?,?)"
      [1]=>
      &array(3) {
        [0]=>
        string(32) "51210693cfbd5fa7f936a25ed36fddb5"
        [1]=>
        int(1438137282)
        [2]=>
        NULL
      }
    }
  }
  [2]=>
  array(6) {
    ["file"]=>
    string(40) "/web/techfinesse/web/tiki/tiki-setup.php"
    ["line"]=>
    int(276)
    ["function"]=>
    string(14) "update_session"
    ["class"]=>
    string(7) "tikilib"
    ["type"]=>
    string(2) "->"
    ["args"]=>
    array(1) {
      [0]=>
      &string(32) "51210693cfbd5fa7f936a25ed36fddb5"
    }
  }
  [3]=>
  array(4) {
    ["file"]=>
    string(35) "/web/techfinesse/web/tiki/index.php"
    ["line"]=>
    int(8)
    ["args"]=>
    array(1) {
      [0]=>
      string(40) "/web/techfinesse/web/tiki/tiki-setup.php"
    }
    ["function"]=>
    string(12) "require_once"
  }
}