diff --git a/.duplicate-id-guard b/.duplicate-id-guard
index 3b1cac2..125f1cd 100644
--- a/.duplicate-id-guard
+++ b/.duplicate-id-guard
@@ -1,3 +1,3 @@
 This file causes merge conflicts if two ID assignment jobs run concurrently.
 This prevents duplicate ID assignment due to a race between those jobs.
-97098036c0218022628b0ef8125668fed1be3c4e7a9f6ca2c9809b8525d6f29d  -
+c1f87706f5085949ee21026957e21bb7eb8328f2f568b059939f12bc799cc258  -
diff --git a/crates/chrono/RUSTSEC-0000-0000.md b/crates/chrono/RUSTSEC-2020-0159.md
similarity index 96%
rename from crates/chrono/RUSTSEC-0000-0000.md
rename to crates/chrono/RUSTSEC-2020-0159.md
index 9e39007..dcdc177 100644
--- a/crates/chrono/RUSTSEC-0000-0000.md
+++ b/crates/chrono/RUSTSEC-2020-0159.md
@@ -1,6 +1,6 @@
 ```toml
 [advisory]
-id = "RUSTSEC-0000-0000"
+id = "RUSTSEC-2020-0159"
 package = "chrono"
 date = "2020-11-10"
 url = "https://github.com/chronotope/chrono/issues/499"