# Contact randomly overwritten **URL:** \ **Category:** Product Support\ **Tags:** mautic-4\ **Created:** [July 7, 2022, 12:51pm UTC](https://forum.mautic.org/t/contact-randomly-overwritten/24711 "2022-07-07T12:51:06Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![brgwrk](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/brgwrk/32/6749_2.png) [@brgwrk](https://forum.mautic.org/u/brgwrk)\ **Post date:** [July 20, 2022, 12:22pm UTC](https://forum.mautic.org/t/contact-randomly-overwritten/24711/2 "2022-07-20T12:22:46Z")
Alright, after a lot of digging I figured it out myself: This problem occurs if you anonymize IP-Addresses, which seems mandatory in the EU. Because of the anonymization a lot of IP addresses look the same and the contacts get merged. So you can either: - Disable IP-Tracking completely - If “Ip anonymize” is enabled, this is not possible via the interface, only in app/config/local.php =\> ‘track\_contact\_by\_ip’ =\> 0. You can also deactivate “anonymize IP”, then deactivate “Ip Tracking”, then activate “anonymize IP” again. - Use this fix, which is not yet merged with the core: [fix: lookup contact by ip in mtc.js tracker \*except\* if anonymised by donbowman · Pull Request #10380 · mautic/mautic · GitHub](https://github.com/mautic/mautic/pull/10380) This Thread helped me out: > [@Problem with tracking different user from same IP Address](https://forum.mautic.org/t/problem-with-tracking-different-user-from-same-ip-address/21165): > > Your software My Mautic version is: 4 Your problem My problem is: First of all i am a beginner. Mautic is running without any Problems so far. I use a wordpress site to track with mautic. I do use the mautic plugin for wordpress and want to track Wordpress users when they are logged in. This also works but with one strange behaviour: When i have different Wordpress users (different names, ID and email) with the same IP always the last one logged in user information gets updated with the new… --- _[View the full topic](https://forum.mautic.org/t/contact-randomly-overwritten/24711)._