From ef5321bf8638eb7c74a6cd29cefa66f92689d187 Mon Sep 17 00:00:00 2001
From: Shyue Ping Ong <shyuep@gmail.com>
Date: Fri, 24 Jan 2025 08:08:40 -0800
Subject: [PATCH] Use md5 for unique hash.

---
 src/pymatgen/io/vasp/outputs.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/pymatgen/io/vasp/outputs.py b/src/pymatgen/io/vasp/outputs.py
index aca673034de..3e7207564a8 100644
--- a/src/pymatgen/io/vasp/outputs.py
+++ b/src/pymatgen/io/vasp/outputs.py
@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import hashlib
 import itertools
 import math
 import os
@@ -869,7 +870,7 @@ def get_computed_entry(
         if entry_id is None:
             calc_date = re.sub(" ", "", self.generator["DATE"])
             calc_time = self.generator["TIME"]
-            hashed_structure = hash(str(self.final_structure))
+            hashed_structure = hashlib.md5(str(self.final_structure).encode("utf-8")).hexdigest()  # noqa: S324
 
             entry_id = f"vasprun-{calc_date}-{calc_time}-{hashed_structure}"
         param_names = {