diff --git a/.env b/.env
new file mode 100644
index 0000000..e69de29
diff --git a/Dockerfile b/Dockerfile
index c495aea..bd25c33 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,9 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     && rm -rf /var/lib/apt/lists/*
 
 COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt \
+    --default-timeout=100 \
+    -i https://pypi.tuna.tsinghua.edu.cn/simple
 
 COPY . .
 
diff --git a/docker-compose.yml b/docker-compose.yml
index d17136b..0b76b74 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -7,7 +7,7 @@ services:
     env_file:
       - .env
     ports:
-      - "${DJANGO_PORT:-8000}:${DJANGO_PORT:-8000}"
+      - "${DJANGO_PORT:-6789}:${DJANGO_PORT:-8000}"
     volumes:
       - static_volume:/app/staticfiles
       - jsonl_archive:/app/archive
diff --git a/manage.py b/manage.py
index e629861..ed9a044 100644
--- a/manage.py
+++ b/manage.py
@@ -4,6 +4,7 @@ import sys
 
 
 def main():
+    sys.path.insert(0, os.path.join(os.path.dirname(os.path.abspath(__file__)), "src"))
     os.environ.setdefault("DJANGO_SETTINGS_MODULE", "config.settings")
     try:
         from django.core.management import execute_from_command_line
diff --git a/scripts/sync_sessions.py b/scripts/sync_sessions.py
index 7ea9f9f..ac4d495 100755
--- a/scripts/sync_sessions.py
+++ b/scripts/sync_sessions.py
@@ -205,9 +205,9 @@ def parse_jsonl(file_path):
             msg_data = {
                 "session_id": session_id,
                 "message_id": msg_id,
-                "parent_id": parent_id,
+                "parent_id": parent_id or "",
                 "seq": message_seq,
-                "role": role,
+                "role": role or "",
                 "content_text": content_text,
                 "raw_content": content_items if content_items else [],
                 "raw_message": event.get("content", []),