diff --git a/sentry_sdk/integrations/_wsgi.py b/sentry_sdk/integrations/_wsgi.py
index 914b0a2b4d..cdfdb2ffc1 100644
--- a/sentry_sdk/integrations/_wsgi.py
+++ b/sentry_sdk/integrations/_wsgi.py
@@ -216,7 +216,8 @@ def event_processor(event, hint):
 
             if _should_send_default_pii():
                 user_info = event.setdefault("user", {})
-                user_info["ip_address"] = get_client_ip(environ)
+                if "ip_address" not in user_info:
+                    user_info["ip_address"] = get_client_ip(environ)
 
             if "query_string" not in request_info:
                 request_info["query_string"] = environ.get("QUERY_STRING")
diff --git a/sentry_sdk/integrations/django.py b/sentry_sdk/integrations/django.py
index 9bdd734f87..550dd03a45 100644
--- a/sentry_sdk/integrations/django.py
+++ b/sentry_sdk/integrations/django.py
@@ -140,15 +140,17 @@ def _set_user_info(request, event):
     if user is None or not is_authenticated(user):
         return
 
-    try:
-        user_info["email"] = user.email
-    except Exception:
-        pass
+    if "email" not in user_info:
+        try:
+            user_info["email"] = user.email
+        except Exception:
+            pass
 
-    try:
-        user_info["username"] = user.get_username()
-    except Exception:
-        pass
+    if "username" not in user_info:
+        try:
+            user_info["username"] = user.get_username()
+        except Exception:
+            pass
 
 
 class _FormatConverter(object):
diff --git a/sentry_sdk/integrations/flask.py b/sentry_sdk/integrations/flask.py
index e94a90e9f0..04a67a2049 100644
--- a/sentry_sdk/integrations/flask.py
+++ b/sentry_sdk/integrations/flask.py
@@ -135,7 +135,7 @@ def _add_user_to_event(event):
 
         user_info = event.setdefault("user", {})
 
-        if user_info.get("id", None) is None:
+        if "id" not in user_info:
             try:
                 user_info["id"] = user.get_id()
                 # TODO: more configurable user attrs here