diff --git a/crates/secrets-core/src/audit.rs b/crates/secrets-core/src/audit.rs
index b8e319f..a739937 100644
--- a/crates/secrets-core/src/audit.rs
+++ b/crates/secrets-core/src/audit.rs
@@ -10,14 +10,8 @@ pub fn current_actor() -> String {
     std::env::var("USER").unwrap_or_default()
 }
 
-fn login_detail(
-    user_id: Uuid,
-    provider: &str,
-    client_ip: Option<&str>,
-    user_agent: Option<&str>,
-) -> Value {
+fn login_detail(provider: &str, client_ip: Option<&str>, user_agent: Option<&str>) -> Value {
     json!({
-        "user_id": user_id,
         "provider": provider,
         "client_ip": client_ip,
         "user_agent": user_agent,
@@ -34,7 +28,7 @@ pub async fn log_login(
     user_agent: Option<&str>,
 ) {
     let actor = current_actor();
-    let detail = login_detail(user_id, provider, client_ip, user_agent);
+    let detail = login_detail(provider, client_ip, user_agent);
     let result: Result<_, sqlx::Error> = sqlx::query(
         "INSERT INTO audit_log (user_id, action, namespace, kind, name, detail, actor) \
          VALUES ($1, $2, $3, $4, $5, $6, $7)",
@@ -94,10 +88,8 @@ mod tests {
 
     #[test]
     fn login_detail_includes_expected_fields() {
-        let user_id = Uuid::nil();
-        let detail = login_detail(user_id, "google", Some("127.0.0.1"), Some("Mozilla/5.0"));
+        let detail = login_detail("google", Some("127.0.0.1"), Some("Mozilla/5.0"));
 
-        assert_eq!(detail["user_id"], json!(user_id));
         assert_eq!(detail["provider"], "google");
         assert_eq!(detail["client_ip"], "127.0.0.1");
         assert_eq!(detail["user_agent"], "Mozilla/5.0");
diff --git a/crates/secrets-core/src/db.rs b/crates/secrets-core/src/db.rs
index 5b60da6..f2fe70a 100644
--- a/crates/secrets-core/src/db.rs
+++ b/crates/secrets-core/src/db.rs
@@ -77,7 +77,6 @@ pub async fn migrate(pool: &PgPool) -> Result<()> {
             created_at  TIMESTAMPTZ  NOT NULL DEFAULT NOW()
         );
 
-        ALTER TABLE audit_log ADD COLUMN IF NOT EXISTS user_id UUID;
         CREATE INDEX IF NOT EXISTS idx_audit_log_created  ON audit_log(created_at DESC);
         CREATE INDEX IF NOT EXISTS idx_audit_log_ns_kind  ON audit_log(namespace, kind);
         CREATE INDEX IF NOT EXISTS idx_audit_log_user_id  ON audit_log(user_id) WHERE user_id IS NOT NULL;
diff --git a/crates/secrets-core/src/service/audit_log.rs b/crates/secrets-core/src/service/audit_log.rs
index 9bd5692..131fce7 100644
--- a/crates/secrets-core/src/service/audit_log.rs
+++ b/crates/secrets-core/src/service/audit_log.rs
@@ -10,7 +10,7 @@ pub async fn list_for_user(pool: &PgPool, user_id: Uuid, limit: i64) -> Result<V
     let rows = sqlx::query_as(
         "SELECT id, user_id, action, namespace, kind, name, detail, actor, created_at \
          FROM audit_log \
-         WHERE user_id = $1 OR (user_id IS NULL AND detail->>'user_id' = $1::text) \
+         WHERE user_id = $1 \
          ORDER BY created_at DESC, id DESC \
          LIMIT $2",
     )