diff --git a/database/schema/schema.sql b/database/schema/schema.sql
index e9ab2aec..9385dd8c 100644
--- a/database/schema/schema.sql
+++ b/database/schema/schema.sql
@@ -263,6 +263,10 @@ ALTER TABLE media_items ADD COLUMN IF NOT EXISTS contributors_search TEXT[];
 ALTER TABLE media_items ADD COLUMN IF NOT EXISTS narrators TEXT[] NOT NULL DEFAULT '{}';
 ALTER TABLE media_items ADD COLUMN IF NOT EXISTS narrators_search TEXT[] NOT NULL DEFAULT '{}';
 ALTER TABLE media_items ADD COLUMN IF NOT EXISTS abridged BOOLEAN NOT NULL DEFAULT FALSE;
+-- audio_metadata is declared in the CREATE TABLE above, which only fresh
+-- installs ever see — this ALTER is the upgrade path for pre-A2 installs
+-- (its absence 42703'd every scan and archive pass on upgraded deployments).
+ALTER TABLE media_items ADD COLUMN IF NOT EXISTS audio_metadata JSONB;
 
 -- Per-field user-override tracking (idempotent backfill for existing
 -- installs; the column is also declared in the media_items table
@@ -371,6 +375,11 @@ CREATE TABLE IF NOT EXISTS reading_progress (
     conflict_resolved BOOLEAN DEFAULT TRUE
 );
 
+-- audio_offset_seconds upgrade path: declared in the CREATE TABLE above
+-- (Batch A) with no ALTER, so pre-A installs lacked the column and every
+-- progress save — the shared upsert names it — failed with SQLSTATE 42703.
+ALTER TABLE reading_progress ADD COLUMN IF NOT EXISTS audio_offset_seconds INTEGER CHECK (audio_offset_seconds >= 0);
+
 -- Create media_ratings table
 CREATE TABLE IF NOT EXISTS media_ratings (
     id UUID PRIMARY KEY DEFAULT gen_random_uuid(),