**List of steps to reproduce** (step by step, including full links if applicable):
* we use the mw javascript api to lazy-load expensive template calls that contain `{{#cargo_query}}` calls (see below)
* i dont know how to reproduce the issue with a minimal code example, because i dont know how cargo backlinks work
* the js example below works fine and does not cause the error; when i debug `CargoBackLinks::setBackLinks`, the `resultsPageIds` param is an empty array
* the js example was tested on a WikiPage in the main namespace with wikitext `Blabla`
**What happens?**:
the fastest xhr request suceeds, all remaining fail with deadlock errors
**What should have happened instead?**:
all xhr requests suceed
**stacktrace**
```
2022-05-12 10:13:21 webmo webmo_webmo: [385926f1d9b1cfdff571c080] /api.php Wikimedia\Rdbms\DBQueryError: Error 1213: Deadlock found when trying to get lock; try restarting transaction (db:3306)
Function: Wikimedia\Rdbms\Database::insert
Query: INSERT INTO `cargo_backlinks` (cbl_query_page_id,cbl_result_page_id) VALUES (305,'318')
#0 /var/www/mediawiki/includes/libs/rdbms/database/Database.php(1590): Wikimedia\Rdbms\Database->getQueryException()
#1 /var/www/mediawiki/includes/libs/rdbms/database/Database.php(1564): Wikimedia\Rdbms\Database->getQueryExceptionAndLog()
#2 /var/www/mediawiki/includes/libs/rdbms/database/Database.php(1173): Wikimedia\Rdbms\Database->reportQueryError()
#3 /var/www/mediawiki/includes/libs/rdbms/database/Database.php(2352): Wikimedia\Rdbms\Database->query()
#4 /var/www/mediawiki/includes/libs/rdbms/database/Database.php(2332): Wikimedia\Rdbms\Database->doInsert()
#5 /var/www/mediawiki/includes/libs/rdbms/database/DBConnRef.php(69): Wikimedia\Rdbms\Database->insert()
#6 /var/www/mediawiki/includes/libs/rdbms/database/DBConnRef.php(375): Wikimedia\Rdbms\DBConnRef->__call()
#7 /var/www/mediawiki/extensions/Cargo/includes/CargoBackLinks.php(50): Wikimedia\Rdbms\DBConnRef->insert()
#8 /var/www/mediawiki/extensions/Cargo/includes/parserfunctions/CargoQuery.php(176): CargoBackLinks::setBackLinks()
#9 /var/www/mediawiki/includes/parser/Parser.php(3413): CargoQuery::run()
#10 /var/www/mediawiki/includes/parser/Parser.php(3096): Parser->callParserFunction()
...
```
**js example**
```
function parse(parseString) {
var api = new mw.Api();
api.parse(parseString, { title: mw.config.values.wgTitle })
.done( function (data) {
console.log(data);
})
.fail( function(err) {
console.error(err);
});
}
var parseString = "{{#cargo_query:tables=my_table}}"
parse(parseString);
```