MediaWiki API result

This is the HTML representation of the JSON format. HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format. To see the non-HTML representation of the JSON format, set format=json.
See the complete documentation, or the API help for more information.
{
    "error": {
        "code": "internal_api_error_DBQueryError",
        "info": "[ff1a04d9688f2f2f446160b2] Exception caught: A database query error has occurred. This may indicate a bug in the software.",
        "errorclass": "Wikimedia\\Rdbms\\DBQueryError",
        "*": "Wikimedia\\Rdbms\\DBQueryError at /var/www/html/includes/libs/rdbms/database/Database.php(1198)\nfrom /var/www/html/includes/libs/rdbms/database/Database.php(1198)\n#0 /var/www/html/includes/libs/rdbms/database/Database.php(1182): Wikimedia\\Rdbms\\Database->getQueryException(string, int, string, string)\n#1 /var/www/html/includes/libs/rdbms/database/Database.php(1156): Wikimedia\\Rdbms\\Database->getQueryExceptionAndLog(string, int, string, string)\n#2 /var/www/html/includes/libs/rdbms/database/Database.php(647): Wikimedia\\Rdbms\\Database->reportQueryError(string, int, string, string, bool)\n#3 /var/www/html/includes/libs/rdbms/database/Database.php(1718): Wikimedia\\Rdbms\\Database->query(Wikimedia\\Rdbms\\Query, string)\n#4 /var/www/html/includes/libs/rdbms/database/DBConnRef.php(127): Wikimedia\\Rdbms\\Database->delete(string, array, string)\n#5 /var/www/html/includes/libs/rdbms/database/DBConnRef.php(581): Wikimedia\\Rdbms\\DBConnRef->__call(string, array)\n#6 /var/www/html/includes/libs/rdbms/querybuilder/DeleteQueryBuilder.php(232): Wikimedia\\Rdbms\\DBConnRef->delete(string, array, string)\n#7 /var/www/html/includes/language/LCStoreDB.php(98): Wikimedia\\Rdbms\\DeleteQueryBuilder->execute()\n#8 /var/www/html/includes/language/LocalisationCache.php(1295): LCStoreDB->finishWrite()\n#9 /var/www/html/includes/language/LocalisationCache.php(614): LocalisationCache->recache(string)\n#10 /var/www/html/includes/language/LocalisationCache.php(523): LocalisationCache->initLanguage(string)\n#11 /var/www/html/includes/language/LocalisationCache.php(403): LocalisationCache->loadSubitem(string, string, string)\n#12 /var/www/html/includes/language/LocalisationCache.php(419): LocalisationCache->getSubitem(string, string, string)\n#13 /var/www/html/includes/language/MessageCache.php(1267): LocalisationCache->getSubitemWithSource(string, string, string)\n#14 /var/www/html/includes/language/MessageCache.php(1209): MessageCache->getMessageForLang(LanguageEn, string, bool, array)\n#15 /var/www/html/includes/language/MessageCache.php(1106): MessageCache->getMessageFromFallbackChain(LanguageEn, string, bool)\n#16 /var/www/html/includes/Message/Message.php(1552): MessageCache->get(string, bool, LanguageEn, string)\n#17 /var/www/html/includes/Message/Message.php(1035): MediaWiki\\Message\\Message->fetchMessage()\n#18 /var/www/html/includes/Message/Message.php(1125): MediaWiki\\Message\\Message->format(string)\n#19 /var/www/html/includes/api/ApiUsageException.php(69): MediaWiki\\Message\\Message->text()\n#20 /var/www/html/includes/api/ApiUsageException.php(85): MediaWiki\\Api\\ApiUsageException->__construct(Wikibase\\Repo\\Api\\EditEntity, StatusValue, int, Wikimedia\\ParamValidator\\ValidationException)\n#21 /var/www/html/includes/api/Validator/ApiParamValidator.php(351): MediaWiki\\Api\\ApiUsageException::newWithMessage(Wikibase\\Repo\\Api\\EditEntity, MediaWiki\\Message\\Message, string, null, int, Wikimedia\\ParamValidator\\ValidationException)\n#22 /var/www/html/includes/api/Validator/ApiParamValidator.php(377): MediaWiki\\Api\\Validator\\ApiParamValidator->convertValidationException(Wikibase\\Repo\\Api\\EditEntity, Wikimedia\\ParamValidator\\ValidationException)\n#23 /var/www/html/includes/api/ApiBase.php(1214): MediaWiki\\Api\\Validator\\ApiParamValidator->getValue(Wikibase\\Repo\\Api\\EditEntity, string, array, array)\n#24 /var/www/html/includes/api/ApiBase.php(879): MediaWiki\\Api\\ApiBase->getParameterFromSettings(string, array, bool)\n#25 /var/www/html/includes/api/ApiMain.php(1553): MediaWiki\\Api\\ApiBase->extractRequestParams()\n#26 /var/www/html/includes/api/ApiMain.php(1953): MediaWiki\\Api\\ApiMain->setupModule()\n#27 /var/www/html/includes/api/ApiMain.php(943): MediaWiki\\Api\\ApiMain->executeAction()\n#28 /var/www/html/includes/api/ApiMain.php(914): MediaWiki\\Api\\ApiMain->executeActionWithErrorHandling()\n#29 /var/www/html/includes/api/ApiEntryPoint.php(153): MediaWiki\\Api\\ApiMain->execute()\n#30 /var/www/html/includes/MediaWikiEntryPoint.php(200): MediaWiki\\Api\\ApiEntryPoint->execute()\n#31 /var/www/html/api.php(44): MediaWiki\\MediaWikiEntryPoint->run()\n#32 {main}"
    }
}