diff --git a/api/init_db.py b/api/init_db.py
index 5c1ace4..1d3c7a3 100644
--- a/api/init_db.py
+++ b/api/init_db.py
@@ -32,6 +32,12 @@ SEED_ASR_IDS = {
     "telespeech_asr": short_id("asr"),
 }
 
+SEED_ASSISTANT_IDS = {
+    "default": short_id("ast"),
+    "customer_service": short_id("ast"),
+    "english_tutor": short_id("ast"),
+}
+
 
 def ensure_db_dir():
     """确保 SQLite 数据目录存在。"""
@@ -193,7 +199,7 @@ def init_default_assistants():
     with db_session() as db:
         assistants = [
             Assistant(
-                id="default",
+                id=SEED_ASSISTANT_IDS["default"],
                 user_id=1,
                 name="AI 助手",
                 call_count=0,
@@ -211,7 +217,7 @@ def init_default_assistants():
                 asr_model_id=SEED_ASR_IDS["sensevoice_small"],
             ),
             Assistant(
-                id="customer_service",
+                id=SEED_ASSISTANT_IDS["customer_service"],
                 user_id=1,
                 name="客服助手",
                 call_count=0,
@@ -227,7 +233,7 @@ def init_default_assistants():
                 config_mode="platform",
             ),
             Assistant(
-                id="english_tutor",
+                id=SEED_ASSISTANT_IDS["english_tutor"],
                 user_id=1,
                 name="英语导师",
                 call_count=0,