Supabase authentication Error 42501- Python

def save_user_pdfs(user_id, pdf_name, pdf_hash, extracted_text, summary):
    print(f"Saving PDF for user_id: {user_id}")  # Debugging
    if not user_id:
        print("Error: user_id is None or missing")
        return False
    
    existing_pdfs = get_user_pdfs(user_id)
    if len(existing_pdfs)>5:
        return False


    data = {
        "user_id" : user_id,
        "pdf_name" : pdf_name,
        "pdf_hash" : pdf_hash,
        "extracted_text" : extracted_text,
        "summary" : summary,
        #"created_at": "now()" 
    }

    #user_id = user.id  # Ensure this is passed to `save_user_pdfs`
    print(f"Authenticated User ID: {user_id}")
    
    try:
        if data["user_id"]:
            print(f"user id is {data['user_id']}")
            response = supabase.table("user_pdfs").insert(data).execute()
            print("response", response)
            return response.data is not None
    except Exception as e:
        print(f"{e}")

I am getting this error: {'code': '42501', 'details': None, 'hint': None, 'message': 'new row violates row-level security policy for table "user_pdfs"'}
Here is my insert policy:
alter policy "Enable insert for users based on user_id" on "public"."user_pdfs"
to authenticated
with check (auth.uid()) = user_id);

Its working when i disable the RLS policy but not with the policy rules. I want that only authenticated users can insert to the user_pdfs table in public database.