There is a PHP Fatal error in my V151 Logs ，how to fix it？

Fatal error: 1062:Duplicate entry 'zc_5b59d6056591802fdad6619320d81905' for key 'PRIMARY' :: insert into db_cache set cache_entry_name = 'zc_5b59d6056591802fdad6619320d81905', cache_data = ' There r many wrong codes like: (YTo5MDM0OntpOjA7YToyOgV2hvbGVzYWxlIFJ1cmFsIFdpbmQ)', cache_entry_created = '1368186265' in /home/zch0071/domains/infashionwholesale.com/public_html/includes/classes/db/mysql/query_factory.php on line 120

My server info:

Server OS: Linux 3.2.0-2-686-pae   	Database: MySQL 5.1.66-0+squeeze1
Server Date: 05/10/2013 17:14:39  	Database Date: 05/10/2013 07:14:39
Server Up Time: 07:14:39 up 20 days, 2:40, 1 user, load average: 1.39, 0.95, 1.00	HTTP Server: Apache/2.2.22 (Debian)
PHP Version: 5.4.0-3 (Zend: 2.4.0)   PHP Memory Limit: 128M	PHP Safe Mode: Off
PHP File Uploads: On    Max Size: 2M	POST Max Size: 8M
Database Data Size: 156,131 kB	Database Index Size: 18,226 kB

this is my website query_factory.php code. How can i fix them?

<?php
/**
 * MySQL query_factory Class.
 * Class used for database abstraction to MySQL
 *
 * @package classes
 * @copyright Copyright 2003-2012 Zen Cart Development Team
 * @copyright Portions Copyright 2003 osCommerce
 * @copyright http://www.data-diggers.com/
 * @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0
 * @version GIT: $Id: Author: Ian Wilson  Wed Jul 4 14:44:03 2012 +0100 Modified in v1.5.1 $
 */
if (!defined('IS_ADMIN_FLAG')) {
  die('Illegal Access');
}
/**
 * Queryfactory - A simple database abstraction layer
 *
 */
class queryFactory extends base {
  var $link, $count_queries, $total_query_time;

  function queryFactory() {
    $this->count_queries = 0;
    $this->total_query_time = 0;
  }

  function query($query, $link) {
      global $queryLog;
      global $queryCache;

      $this->total_queries++;
      if(isset($queryCache) && $queryCache->inCache($query)) {
            $cached_value = $queryCache->getFromCache($query);
            $this->count_queries--;
            return($cached_value);
      }

      if(isset($queryLog)) $queryLog->start($query);
      $result = mysql_query($query, $link);
      if(isset($queryLog)) $queryLog->stop($query, $result);
      if(isset($queryCache)) $queryCache->cache($query, $result);
      return($result);
  }

  function connect($zf_host, $zf_user, $zf_password, $zf_database, $zf_pconnect = 'false', $zp_real = false) {
    $this->database = $zf_database;
    $this->user = $zf_user;
    $this->host = $zf_host;
    $this->password = $zf_password;
    $this->pConnect = $zf_pconnect;
    $this->real = $zp_real;
    if (!function_exists('mysql_connect')) die ('Call to undefined function: mysql_connect().  Please install the MySQL Connector for PHP');
    $connectionRetry = 10;
    while (!isset($this->link) || ($this->link == FALSE && $connectionRetry !=0) )
    {
      $this->link = @mysql_connect($zf_host, $zf_user, $zf_password, true);
      $connectionRetry--;
    }
    if ($this->link) {
      if (@mysql_select_db($zf_database, $this->link)) {
        if (defined('DB_CHARSET') && version_compare(@mysql_get_server_info(), '4.1.0', '>=')) {
          @mysql_query("SET NAMES '" . DB_CHARSET . "'", $this->link);
          if (function_exists('mysql_set_charset')) {
            @mysql_set_charset(DB_CHARSET, $this->link);
          } else {
            @mysql_query("SET CHARACTER SET '" . DB_CHARSET . "'", $this->link);
          }
        }
        $this->db_connected = true;
        if (getenv('TZ') && !defined('DISABLE_MYSQL_TZ_SET')) @mysql_query("SET time_zone = '" . substr_replace(date("O"),":",-2,0) . "'", $this->link);
        return true;
      } else {
        $this->set_error(mysql_errno(),mysql_error(), $zp_real);
        return false;
      }
    } else {
      $this->set_error(mysql_errno(),mysql_error(), $zp_real);
      return false;
    }
  }

  function selectdb($zf_database) {
    @mysql_select_db($zf_database, $this->link);
  }

  function prepare_input($zp_string) {
    if (function_exists('mysql_real_escape_string')) {
      return mysql_real_escape_string($zp_string, $this->link);
    } elseif (function_exists('mysql_escape_string')) {
      return mysql_escape_string($zp_string, $this->link);
    } else {
      return addslashes($zp_string);
    }
  }

  function close() {
    @mysql_close($this->link);
  }

  function set_error($zp_err_num, $zp_err_text, $zp_fatal = true) {
    $this->error_number = $zp_err_num;
    $this->error_text = $zp_err_text;
    if ($zp_fatal && $zp_err_num != 1141) { // error 1141 is okay ... should not die on 1141, but just continue on instead
      $this->show_error();
      die();
    }
  }

  function show_error() {
    if ($this->error_number == 0 && $this->error_text == DB_ERROR_NOT_CONNECTED && !headers_sent() && file_exists('nddbc.html') ) include('nddbc.html');
    echo '<div class="systemError">';
    if (defined('STRICT_ERROR_REPORTING') && STRICT_ERROR_REPORTING == true)
    {
      echo $this->error_number . ' ' . $this->error_text;
      echo '<br />in:<br />[' . (strstr($this->zf_sql, 'db_cache') ? 'db_cache table' : $this->zf_sql) . ']<br />';
    } else {
      echo 'WARNING: An Error occurred, please refresh the page and try again.';
    }
    trigger_error($this->error_number . ':' . $this->error_text . ' :: ' . $this->zf_sql, E_USER_ERROR);
    if (defined('IS_ADMIN_FLAG') && IS_ADMIN_FLAG==true) echo 'If you were entering information, press the BACK button in your browser and re-check the information you had entered to be sure you left no blank fields.<br />';
    echo '</div>';
  }

  function Execute($zf_sql, $zf_limit = false, $zf_cache = false, $zf_cachetime=0) {
    // bof: collect database queries
    if (defined('STORE_DB_TRANSACTIONS') && STORE_DB_TRANSACTIONS=='true') {
      global $PHP_SELF, $box_id, $current_page_base;
      if (strtoupper(substr($zf_sql,0,6))=='SELECT' /*&& strstr($zf_sql,'products_id')*/) {
        $f=@fopen(DIR_FS_SQL_CACHE.'/query_selects_' . $current_page_base . '_' . time() . '.txt','a');
        if ($f) {
          fwrite($f,  "\n\n" . 'I AM HERE ' . $current_page_base . /*zen_get_all_get_params() .*/ "\n" . 'sidebox: ' . $box_id . "\n\n" . "Explain \n" . $zf_sql.";\n\n");
          fclose($f);
        }
        unset($f);
      }
    }
    // eof: collect products_id queries
    global $zc_cache;
    if ($zf_limit) {
      $zf_sql = $zf_sql . ' LIMIT ' . $zf_limit;
    }
    $this->zf_sql = $zf_sql;
    if($zf_cache AND $zc_cache->sql_cache_exists($zf_sql, $zf_cachetime)) {
      $obj = new queryFactoryResult;
      $obj->cursor = 0;
      $obj->is_cached = true;
      $obj->sql_query = $zf_sql;
      $zp_result_array = $zc_cache->sql_cache_read($zf_sql);
      $obj->result = $zp_result_array;
      if (sizeof($zp_result_array) > 0 ) {
        $obj->EOF = false;
        while (list($key, $value) = each($zp_result_array[0])) {
          $obj->fields[$key] = $value;
        }
      } else {
        $obj->EOF = true;
      }
      return $obj;
    } elseif ($zf_cache) {
      $zc_cache->sql_cache_expire_now($zf_sql);
      $time_start = explode(' ', microtime());
      $obj = new queryFactoryResult;
      $obj->sql_query = $zf_sql;
      if (!$this->db_connected)
      {
        if (!$this->connect($this->host, $this->user, $this->password, $this->database, $this->pConnect, $this->real))
        $this->set_error('0', DB_ERROR_NOT_CONNECTED);
      }
      $zp_db_resource = @$this->query($zf_sql, $this->link);
      if (!$zp_db_resource) $this->set_error(@mysql_errno(),@mysql_error());
      if(!is_resource($zp_db_resource)){
        $obj = null;
        return true;
      }
      $obj->resource = $zp_db_resource;
      $obj->cursor = 0;
      if ($obj->RecordCount() > 0) {
        $obj->EOF = false;
        $zp_ii = 0;
        while (!$obj->EOF) {
          $zp_result_array = @mysql_fetch_array($zp_db_resource);
          if ($zp_result_array) {
            while (list($key, $value) = each($zp_result_array)) {
              if (!preg_match('/^[0-9]/', $key)) {
                $obj->result[$zp_ii][$key] = $value;
              }
            }
          } else {
            $obj->Limit = $zp_ii;
            $obj->EOF = true;
          }
          $zp_ii++;
        }
        while (list($key, $value) = each($obj->result[$obj->cursor])) {
          if (!preg_match('/^[0-9]/', $key)) {
            $obj->fields[$key] = $value;
          }
        }
        $obj->EOF = false;
      } else {
        $obj->EOF = true;
      }
      $obj->is_cached = true;
      $zc_cache->sql_cache_store($zf_sql, $obj->result);
      $time_end = explode (' ', microtime());
      $query_time = $time_end[1]+$time_end[0]-$time_start[1]-$time_start[0];
      $this->total_query_time += $query_time;
      $this->count_queries++;
      return($obj);
    } else {
      $time_start = explode(' ', microtime());
      $obj = new queryFactoryResult;
      if (!$this->db_connected)
      {
        if (!$this->connect($this->host, $this->user, $this->password, $this->database, $this->pConnect, $this->real))
        $this->set_error('0', DB_ERROR_NOT_CONNECTED);
      }
      $zp_db_resource = @$this->query($zf_sql, $this->link);
      if (!$zp_db_resource) {
        if (@mysql_errno($this->link) == 2006) {
          $this->link = FALSE;
          $this->connect($this->host, $this->user, $this->password, $this->database, $this->pConnect, $this->real);
          $zp_db_resource = @mysql_query($zf_sql, $this->link);
        }
        if (!$zp_db_resource) {
          $this->set_error(@mysql_errno($this->link),@mysql_error($this->link));
        }
      }
      if(!is_resource($zp_db_resource)){
        $obj = null;
        return true;
      }
      $obj->resource = $zp_db_resource;
      $obj->cursor = 0;
      if ($obj->RecordCount() > 0) {
        $obj->EOF = false;
        $zp_result_array = @mysql_fetch_array($zp_db_resource);
        if ($zp_result_array) {
          while (list($key, $value) = each($zp_result_array)) {
            if (!preg_match('/^[0-9]/', $key)) {
              $obj->fields[$key] = $value;
            }
          }
          $obj->EOF = false;
        } else {
          $obj->EOF = true;
        }
      } else {
        $obj->EOF = true;
      }

      $time_end = explode (' ', microtime());
      $query_time = $time_end[1]+$time_end[0]-$time_start[1]-$time_start[0];
      $this->total_query_time += $query_time;
      $this->count_queries++;
      return($obj);
    }
  }

  function ExecuteRandomMulti($zf_sql, $zf_limit = 0, $zf_cache = false, $zf_cachetime=0) {
    $this->zf_sql = $zf_sql;
    $time_start = explode(' ', microtime());
    $obj = new queryFactoryResult;
    $obj->result = array();
    if (!$this->db_connected)
    {
      if (!$this->connect($this->host, $this->user, $this->password, $this->database, $this->pConnect, $this->real))
      $this->set_error('0', DB_ERROR_NOT_CONNECTED);
    }
    $zp_db_resource = @$this->query($zf_sql, $this->link);
    if (!$zp_db_resource) $this->set_error(mysql_errno(),mysql_error());
    if(!is_resource($zp_db_resource)){
      $obj = null;
      return true;
    }
    $obj->resource = $zp_db_resource;
    $obj->cursor = 0;
    $obj->Limit = $zf_limit;
    if ($obj->RecordCount() > 0 && $zf_limit > 0) {
      $obj->EOF = false;
      $zp_Start_row = 0;
      if ($zf_limit) {
      $zp_start_row = zen_rand(0, $obj->RecordCount() - $zf_limit);
      }
      $obj->Move($zp_start_row);
      $obj->Limit = $zf_limit;
      $zp_ii = 0;
      while (!$obj->EOF) {
        $zp_result_array = @mysql_fetch_array($zp_db_resource);
        if ($zp_ii == $zf_limit) $obj->EOF = true;
        if ($zp_result_array) {
          while (list($key, $value) = each($zp_result_array)) {
            $obj->result[$zp_ii][$key] = $value;
          }
        } else {
          $obj->Limit = $zp_ii;
          $obj->EOF = true;
        }
        $zp_ii++;
      }
      $obj->result_random = array_rand($obj->result, sizeof($obj->result));
      if (is_array($obj->result_random)) {
        $zp_ptr = $obj->result_random[$obj->cursor];
      } else {
        $zp_ptr = $obj->result_random;
      }
      while (list($key, $value) = each($obj->result[$zp_ptr])) {
        if (!preg_match('/^[0-9]/', $key)) {
          $obj->fields[$key] = $value;
        }
      }
      $obj->EOF = false;
    } else {
      $obj->EOF = true;
    }

    $time_end = explode (' ', microtime());
    $query_time = $time_end[1]+$time_end[0]-$time_start[1]-$time_start[0];
    $this->total_query_time += $query_time;
    $this->count_queries++;
    return($obj);
  }

  function insert_ID() {
    return @mysql_insert_id($this->link);
  }

  function metaColumns($zp_table) {
    $sql = "SHOW COLUMNS from :tableName:";
    $sql = $this->bindVars($sql, ':tableName:', $zp_table, 'noquotestring');
    $res = $this->execute($sql);
    while (!$res->EOF)
    {
      $obj [strtoupper($res->fields['Field'])] = new queryFactoryMeta($res->fields);
      $res->MoveNext();
    }
    return $obj;
  }

  function get_server_info() {
    if ($this->link) {
      return mysql_get_server_info($this->link);
    } else {
      return UNKNOWN;
    }
  }

  function queryCount() {
    return $this->count_queries;
  }

  function queryTime() {
    return $this->total_query_time;
  }

  function perform ($tableName, $tableData, $performType='INSERT', $performFilter='', $debug=false) {
    switch (strtolower($performType)) {
      case 'insert':
      $insertString = "";
      $insertString = "INSERT INTO " . $tableName . " (";
      foreach ($tableData as $key => $value) {
        if ($debug === true) {
          echo $value['fieldName'] . '#';
        }
        $insertString .= $value['fieldName'] . ", ";
      }
      $insertString = substr($insertString, 0, strlen($insertString)-2) . ') VALUES (';
      reset($tableData);
      foreach ($tableData as $key => $value) {
        $bindVarValue = $this->getBindVarValue($value['value'], $value['type']);
        $insertString .= $bindVarValue . ", ";
      }
      $insertString = substr($insertString, 0, strlen($insertString)-2) . ')';
      if ($debug === true) {
        echo $insertString;
        die();
      } else {
        $this->execute($insertString);
      }
      break;
      case 'update':
      $updateString ="";
      $updateString = 'UPDATE ' . $tableName . ' SET ';
      foreach ($tableData as $key => $value) {
        $bindVarValue = $this->getBindVarValue($value['value'], $value['type']);
        $updateString .= $value['fieldName'] . '=' . $bindVarValue . ', ';
      }
      $updateString = substr($updateString, 0, strlen($updateString)-2);
      if ($performFilter != '') {
        $updateString .= ' WHERE ' . $performFilter;
      }
      if ($debug === true) {
        echo $updateString;
        die();
      } else {
        $this->execute($updateString);
      }
      break;
    }
  }
  function getBindVarValue($value, $type) {
    $typeArray = explode(':',$type);
    $type = $typeArray[0];
    switch ($type) {
      case 'csv':
        return $value;
      break;
      case 'passthru':
        return $value;
      break;
      case 'float':
        return (!zen_not_null($value) || $value=='' || $value == 0) ? 0 : $value;
      break;
      case 'integer':
        return (int)$value;
      break;
      case 'string':
        if (isset($typeArray[1])) {
          $regexp = $typeArray[1];
        }
        return '\'' . $this->prepare_input($value) . '\'';
      break;
      case 'noquotestring':
        return $this->prepare_input($value);
      break;
      case 'currency':
        return '\'' . $this->prepare_input($value) . '\'';
      break;
      case 'date':
        return '\'' . $this->prepare_input($value) . '\'';
      break;
      case 'enum':
        if (isset($typeArray[1])) {
          $enumArray = explode('|', $typeArray[1]);
        }
        return '\'' . $this->prepare_input($value) . '\'';
      case 'regexp':
        $searchArray = array('[', ']', '(', ')', '{', '}', '|', '*', '?', '.', '$', '^');
        foreach ($searchArray as $searchTerm) {
          $value = str_replace($searchTerm, '\\' . $searchTerm, $value);
        }
        return $this->prepare_input($value);
      default:
      die('var-type undefined: ' . $type . '('.$value.')');
    }
  }
/**
 * method to do bind variables to a query
**/
  function bindVars($sql, $bindVarString, $bindVarValue, $bindVarType, $debug = false) {
    $bindVarTypeArray = explode(':', $bindVarType);
    $sqlNew = $this->getBindVarValue($bindVarValue, $bindVarType);
    $sqlNew = str_replace($bindVarString, $sqlNew, $sql);
    return $sqlNew;
  }

  function prepareInput($string) {
    return $this->prepare_input($string);
  }
}

class queryFactoryResult {

  function queryFactoryResult() {
    $this->is_cached = false;
  }

  function MoveNext() {
    global $zc_cache;
    $this->cursor++;
    if ($this->is_cached) {
      if ($this->cursor >= sizeof($this->result)) {
        $this->EOF = true;
      } else {
        while(list($key, $value) = each($this->result[$this->cursor])) {
          $this->fields[$key] = $value;
        }
      }
    } else {
      $zp_result_array = @mysql_fetch_array($this->resource);
      if (!$zp_result_array) {
        $this->EOF = true;
      } else {
        while (list($key, $value) = each($zp_result_array)) {
          if (!preg_match('/^[0-9]/', $key)) {
            $this->fields[$key] = $value;
          }
        }
      }
    }
  }

  function MoveNextRandom() {
    $this->cursor++;
    if ($this->cursor < $this->Limit) {
      $zp_result_array = $this->result[$this->result_random[$this->cursor]];
      while (list($key, $value) = each($zp_result_array)) {
        if (!preg_match('/^[0-9]/', $key)) {
          $this->fields[$key] = $value;
        }
      }
    } else {
      $this->EOF = true;
    }
  }

  function RecordCount() {
    if ($this->is_cached)
	  return sizeof($this->result);
  	return @mysql_num_rows($this->resource);
  }

  function Move($zp_row) {
    global $db;
	if ($this->is_cached) {
    	if($zp_row >= sizeof($this->result)) {
    		$this->cursor = sizeof($this->result);
    		$this->EOF = true;
    	}
    	else {
    		$this->cursor = $zp_row;
    		while(list($key, $value) = each($this->result[$this->cursor])) {
        	  $this->fields[$key] = $value;
        	}
    		$this->EOF = false;
    	}
    }
    else if (@mysql_data_seek($this->resource, $zp_row)) {
      $zp_result_array = @mysql_fetch_array($this->resource);
        while (list($key, $value) = each($zp_result_array)) {
          $this->fields[$key] = $value;
        }
      @mysql_data_seek($this->resource, $zp_row);
      $this->EOF = false;
      return;
    } else {
      $this->EOF = true;
      $db->set_error(mysql_errno(),mysql_error());
    }
  }
}

class queryFactoryMeta {

  function queryFactoryMeta($zp_field) {
    $type = $zp_field['Type'];
    $rgx = preg_match('/^[a-z]*/', $type, $matches);
    $this->type = $matches[0];
    $this->max_length = preg_replace('/[a-z\(\)]/', '', $type);
  }
}

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