diff --git a/docs/ISSUES.md b/docs/ISSUES.md
index b8265ca..cec6bc3 100644
--- a/docs/ISSUES.md
+++ b/docs/ISSUES.md
@@ -129,9 +129,9 @@ not a one-commit fix. Compose from holtburger's pattern.
 
 ---
 
-## #62 — PARTSDIAG null-guard for sequencer-driven entities
+## #62 — [DONE 2026-05-14 · `ec9fd52`] PARTSDIAG null-guard for sequencer-driven entities
 
-**Status:** OPEN
+**Status:** DONE
 **Severity:** LOW (latent crash; not reachable for doors today — see notes)
 **Filed:** 2026-05-13 (code-quality review of B.4c Task 1)
 **Component:** diagnostic / `GameWindow.TickAnimations` PARTSDIAG block