Issues with installing Piwik PRO and Matomo on the same site

Data collection and tags
7

I double checked this setup and it turned out it’s prone to race conditions between Matomo and Piwik PRO tracking libraries. Let’s switch to the initial idea that should be safe.

  1. Disable the default Piwik PRO tag.
  2. Create a new custom code tag that would send data to Piwik PRO using an alternative namespace. Trigger: All pages. Consent type: Does not require consent (since the tag handles anonymous tracking as well):
<script>
    var _ppas = _ppas || [];
    (function () {
        var trackAnonymously = {{ Piwik PRO Anonymization }}('analytics');
        if (trackAnonymously) {
            _ppas.push(['setUserIsAnonymous', 1]);
            _ppas.push(['disableCookies']);
        }
    }());
    _ppas.push(["trackPageView"]);
    _ppas.push(["enableLinkTracking"]);
    (function() {
        var u = "https://explore-esch.piwik.pro/";
        _ppas.push(["setTrackerUrl", u + "ppms.php"]);
        _ppas.push(["setSiteId", "2c481c7b-7c0e-4a3e-ba23-5233f3af713a"]);
        var d = document,
            g = d.createElement("script"),
            s = d.getElementsByTagName("script")[0];
        g.type = "text/javascript";
        g.async = true;
        g.defer = true;
        g.src = u + "ppas.js";
        s.parentNode.insertBefore(g, s);
    })();
</script>
  1. Create an additional custom code tag that handles the deanonymization right after the consent is granted. Trigger: All pages. Consent type: Analytics:
<script>
var _ppas = window._ppas || [];
    (function () {
        var consents = {{ Consents }};
        var consentType = 'analytics';
        if (typeof consents !== 'undefined' &&
            consents.hasOwnProperty('current_state') &&
            consents.current_state.hasOwnProperty(consentType) &&
            consents.current_state[consentType] === 1 &&
            consents.hasOwnProperty('previous_state') &&
            consents.previous_state.hasOwnProperty(consentType) &&
            consents.previous_state[consentType] !== 1
        ) {
            _ppas.push(['enableCookies']);
            _ppas.push(['deanonymizeUser']);
        }
    }());  
</script>
  1. Revert the Matomo tag to the original code that you used before (the one with _paq.push commands).