diff --git a/internal/db/migrations/134_berufung_unification.down.sql b/internal/db/migrations/134_berufung_unification.down.sql
index c26f6ed..04455fc 100644
--- a/internal/db/migrations/134_berufung_unification.down.sql
+++ b/internal/db/migrations/134_berufung_unification.down.sql
@@ -9,6 +9,16 @@
 -- never deleted them — that's what makes this down-migration safe).
 -- ---------------------------------------------------------------
 
+-- ---------------------------------------------------------------
+-- 0. Audit reason (required by mig 079 trigger — step 2 UPDATEs
+--    paliad.deadline_rules to reverse the reassignment).
+-- ---------------------------------------------------------------
+
+SELECT set_config(
+    'paliad.audit_reason',
+    'mig 134 DOWN: revert Slice B1 — restore 3 separate UPC appeal proceeding_types, drop applies_to_target column',
+    true);
+
 -- ---------------------------------------------------------------
 -- 1. Un-archive the 3 old appeal proceeding_types.
 -- ---------------------------------------------------------------
diff --git a/internal/db/migrations/134_berufung_unification.up.sql b/internal/db/migrations/134_berufung_unification.up.sql
index b7024fb..4df2e52 100644
--- a/internal/db/migrations/134_berufung_unification.up.sql
+++ b/internal/db/migrations/134_berufung_unification.up.sql
@@ -25,6 +25,16 @@
 --
 -- See docs/design-litigation-planner-2026-05-26.md §18.1.
 
+-- ---------------------------------------------------------------
+-- 0. Audit reason (required by mig 079 trigger for any UPDATE on
+--    paliad.deadline_rules — step 4 reassigns 16 rules).
+-- ---------------------------------------------------------------
+
+SELECT set_config(
+    'paliad.audit_reason',
+    'mig 134: t-paliad-292 Slice B1 — Berufung unification, collapse 3 UPC appeal proceeding_types into upc.apl.unified + appeal_target discriminator',
+    true);
+
 -- ---------------------------------------------------------------
 -- 1. Schema additions
 -- ---------------------------------------------------------------