How to find a duplicate script in bitrix?

Question

JavaScript

I paste the code in header.php before the closing tag

<script type="text/javascript">
var __cs = __cs || [];
__cs.push(["setCsAccount", "r2SUDNORm1gfqBLnmsTKxXUGPDXE9zcA"]);
</script>
<script type="text/javascript" async src="//app.comagic.ru/static/cs.min.js"></script>

After clearing the cache and without pasted code is duplicated except for the line

var __cs = __cs || [];
__cs.push(["setCsAccount", "r2SUDNORm1gfqBLnmsTKxXUGPDXE9zcA"]);

Insert another key

var __cs=__cs||[];__cs.push(["setCsAccount","WwXzXvFeSlrSyfGXaFudK4sZALPhnKOg"]);

Script error in console:

How can I find where it comes from? I cleared the cache, no caching systems are used on the server, only the built-in bitrix tools.
Already dug everything. I downloaded all the site files, php-storm does not find anything.
PS
the service https://www.uiscom.ru/ is used for call tracking, i.e. change of phone number on the site.

Answer 1

Actually, Bitrix has a very mediocre attitude to this issue, and the question here is much deeper: how to find duplication of information on the site in general.
Read about grep

Answer 2

there was a commented duplicate of the script, it was pulled up

<!-- <script type="text/javascript" async src="//app.comagic.ru/static/cs.min.js"></script> -->