diff --git a/09 - Audits/Activity Log.md b/09 - Audits/Activity Log.md
index 77cf256..f388c14 100644
--- a/09 - Audits/Activity Log.md	
+++ b/09 - Audits/Activity Log.md	
@@ -1073,4 +1073,22 @@ the new device shows (frontend surfaces backend message verbatim).
 
 ---
 
+### 2026-06-03 — backend v2.8.71 — fix template-creation 500 (blank optional fields vs CHECK constraints)
+
+Seller "create request template" returned HTTP 500 whenever optional fields were
+left empty. The request_templates table has CHECK constraints that allow only
+NULL or a valid pattern — product_link (`~ '^https?://.+'`) and delivery_email
+(email regex) — and the nullable service_session_type enum rejects ''. Both
+DrizzleMarketplaceRepo.createRequestTemplate and updateRequestTemplate passed the
+form's empty strings straight into the INSERT/UPDATE, tripping the constraints.
+Added a `blank()` coercion: blank optional strings → NULL/undefined for
+product_link, delivery_email, size/color/brand, service_location/notes,
+proposal_title/description, service_session_type; enum columns (product_type,
+delivery_type, urgency, budget_currency, metadata_source) fall back to their
+defaults instead of receiving ''.
+(Confirmed deployed backend is now on the 2.8.x line — logs show v2.8.70.)
+**Verification:** backend tsc clean.
+
+---
+
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