Diagnostic - System Check - File Integrity

Getting the following error when I run a system check.
File integrity check failed and reported some errors. You should fix this issue and then refresh this page until it shows no error. Files were found in your Matomo but we didn’t expect them.
–> Please delete these files to prevent errors. <–

File to delete: error_log

To delete all these files at once, you can run this command:
rm “/home/position/public_html/piwik/error_log”

This is the content of the error_log file
[13-Feb-2018 05:29:23 UTC] Error in Matomo (tracker): Invalid idSite: ‘0’

[13-Feb-2018 05:29:24 UTC] Error in Matomo (tracker): Invalid idSite: ‘5’

This goes on and on its the same two idSite 0 and 5

I know what the error is. Its a profile that we created for a website and now we are no longer tracking it so we deleted the profile but the tracker is still on the webpages and we don’t have access to the website anymore to remove the tracker. We asked the website owners for help to remove the tracking code but they have not done it. Its has been a while. I just don’t know how to stop it. Can anyone help?