Google Adwords API TargetingIdea KEYWORD_TEXT returns trailing numbers

# sample return data from TargetingIdea following https://developers.google.com/adwords/api/docs/samples/php/optimization#get-keywords-related-to-a-seed-keyword Google\AdsApi\AdWords\v201809\o\TargetingIdea^ {#2396   #data: array:5 [     0 => Google\AdsApi\AdWords\v201809\o\Type_AttributeMapEntry^ {#2441       #key: "KEYWORD_TEXT"       #value: Google\AdsApi\AdWords\v201809\o\StringAttribute^ {#2439         #value: "digital agency thailand ff9d9077"         #AttributeType: "StringAttribute"         -parameterMap: array:1 [           "Attribute.Type" => "AttributeType"         ]       }     } 

The method of calling for the keyword idea generations are done correctly

        $querySearchParam = new RelatedToQuerySearchParameter();         $querySearchParam->setQueries($keywords);         $searchParameters[] = $querySearchParam;         $relatedUrlSearchParam = new RelatedToUrlSearchParameter();         $relatedUrlSearchParam->setUrls($urls);         $searchParameters[] = $relatedUrlSearchParam;         $languageParam = new LanguageSearchParameter();         $languageParam->setLanguages([new Language(1000)]);         $searchParameters[] = $languageParam;         $networkSearchParam = new NetworkSearchParameter();          $networkSearchParam->setNetworkSetting(new NetworkSetting(true));         $searchParameters[] = $networkSearchParam; 

However it returns a randomly generated alphanumeric after the keyword text. Eg: ff9d9077 at the end of the KEYWORD_TEXT attribute digital agency thailand. Where the same keyword idea returns multiple times but with different randomly generated trailing alphanumeric text such as digital agency thailand 13fdc22, digital agency thailand c73761c etc

Anyone can advice what might went wrong on this?