Replacing old Google Analytics script

[mac13]

While browsing the html code of my website recently, I noticed an old Google Analytics scrypt with a bad old ID. It is not visible in the tabs of the 'Page html' tool, which can be changed. I put it in there using the old WWB version. How to replace the code with the current one?
It applies to all my subpages (a lot).
https://wasowscy.net/wasowscy.net.wbs

[Pablo]

You can edit the code the same way as how you have added it.
If it's not in the Page HTML then you may have added it via Site HTML or on the master page.

[mac13]

Found! (Site HTML).
Thank You!
maciek