diff --git a/backend_api_python/app/services/signal_notifier.py b/backend_api_python/app/services/signal_notifier.py
index 22a0e7b..8f41753 100644
--- a/backend_api_python/app/services/signal_notifier.py
+++ b/backend_api_python/app/services/signal_notifier.py
@@ -231,7 +231,6 @@ class SignalNotifier:
                 else:
                     ok, err = False, f"unsupported_channel:{c}"
             except Exception as e:
-                logger.error(rf'signal notify error: {traceback.format_exc()}')
                 ok, err = False, str(e)
 
             results[c] = {"ok": bool(ok), "error": (err or "")}
diff --git a/backend_api_python/migrations/init.sql b/backend_api_python/migrations/init.sql
index aec68e9..96a221b 100644
--- a/backend_api_python/migrations/init.sql
+++ b/backend_api_python/migrations/init.sql
@@ -275,7 +275,7 @@ CREATE INDEX IF NOT EXISTS idx_notifications_is_read ON qd_strategy_notification
 -- 7. Indicator Codes
 -- =============================================================================
 
-CREATE TABLE public.qd_indicator_codes (
+CREATE TABLE IF NOT EXISTS qd_indicator_codes (
    id serial4 NOT NULL,
    user_id int4 DEFAULT 1 NOT NULL,
    is_buy int4 DEFAULT 0 NOT NULL,
@@ -302,9 +302,11 @@ CREATE TABLE public.qd_indicator_codes (
    reviewed_by int4 NULL,
    CONSTRAINT qd_indicator_codes_pkey PRIMARY KEY (id),
    CONSTRAINT qd_indicator_codes_user_id_fkey FOREIGN KEY (user_id) REFERENCES qd_users(id) ON DELETE CASCADE
+
 );
-CREATE INDEX idx_indicator_codes_user_id ON public.qd_indicator_codes USING btree (user_id);
-CREATE INDEX idx_indicator_review_status ON public.qd_indicator_codes USING btree (review_status);
+
+CREATE INDEX idx_indicator_codes_user_id ON qd_indicator_codes USING btree (user_id);
+CREATE INDEX idx_indicator_review_status ON qd_indicator_codes USING btree (review_status);
 
 -- =============================================================================
 -- 8. AI Decisions