diff --git a/.duplicate-id-guard b/.duplicate-id-guard
index efff7c8..3afff09 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.
-98c8a3a4f0b91dc5b78386122834d867c33b4a4c05f99f1f229242b9619f4961  -
+919efaf7a9a76c01d96bf7a09f685007c3bd318388d34f048907209725d80ada  -
diff --git a/crates/mz-avro/RUSTSEC-0000-0000.md b/crates/mz-avro/RUSTSEC-2021-0138.md
similarity index 97%
rename from crates/mz-avro/RUSTSEC-0000-0000.md
rename to crates/mz-avro/RUSTSEC-2021-0138.md
index ed143ef..e361eb3 100644
--- a/crates/mz-avro/RUSTSEC-0000-0000.md
+++ b/crates/mz-avro/RUSTSEC-2021-0138.md
@@ -1,6 +1,6 @@
 ```toml
 [advisory]
-id = "RUSTSEC-0000-0000"
+id = "RUSTSEC-2021-0138"
 package = "mz-avro"
 date = "2021-10-14"
 url = "https://github.com/MaterializeInc/materialize/issues/8669"