diff --git a/backend/open_webui/models/config.py b/backend/open_webui/models/config.py
index 5d0b2266b7..00fcfc2e00 100644
--- a/backend/open_webui/models/config.py
+++ b/backend/open_webui/models/config.py
@@ -248,6 +248,10 @@ class Config(Base):
             now = int(time.time())
             new_count = 0
             for key, value in defaults.items():
+                # Skip keys the DB is not authoritative for (e.g. oauth.* while
+                # ENABLE_OAUTH_PERSISTENT_CONFIG is off), matching the read paths.
+                if not Config.persistent_enabled_for(key):
+                    continue
                 if key not in existing_keys:
                     value = _json_value(value)
                     db.add(Config(key=key, value=value, updated_at=now))