diff --git a/apps/edr-freight-api/src/migrations/2090000000000-RepairGrnNumberColumn.ts b/apps/edr-freight-api/src/migrations/2090000000000-RepairGrnNumberColumn.ts
new file mode 100644
index 000000000..aa2f998a2
--- /dev/null
+++ b/apps/edr-freight-api/src/migrations/2090000000000-RepairGrnNumberColumn.ts
@@ -0,0 +1,55 @@
+import { MigrationInterface, QueryRunner } from 'typeorm';
+
+/**
+ * Repairs `freight.warehouse_inventory.grn_number`.
+ *
+ * AddGrnNumberToWarehouseInventory1828000000000 is recorded in `migrations` but
+ * the column is absent on at least one environment - it was added, then dropped
+ * out-of-band (a stray `synchronize: true`, same class of damage that
+ * RepairSynchronizeDrift1870000000000 already had to undo). Because TypeORM has
+ * the original recorded, it will never re-run it.
+ *
+ * Without the column, everything that reads or writes a GRN fails with
+ * `column ... grn_number does not exist`:
+ *   - bulkReceive()             -> INSERT names grn_number  (receive to warehouse)
+ *   - importQueueByStatuses()   -> Unloaded + Dispatch queues
+ *   - exportInventoryByStatus() -> Received / Ready-To-Load / Loaded tabs
+ *   - grnDocument()             -> GRN PDF
+ *
+ * Idempotent: a no-op on environments where the column survived.
+ */
+export class RepairGrnNumberColumn2090000000000 implements MigrationInterface {
+  name = 'RepairGrnNumberColumn2090000000000';
+
+  public async up(queryRunner: QueryRunner): Promise<void> {
+    await queryRunner.query(`
+      ALTER TABLE freight.warehouse_inventory
+      ADD COLUMN IF NOT EXISTS grn_number VARCHAR(100) NULL
+    `);
+
+    // Recover the GRN for rows received before the column existed: it was also
+    // written into the receive note as "GRN Number: <value>".
+    await queryRunner.query(`
+      UPDATE freight.warehouse_inventory
+         SET grn_number = substring(notes FROM 'GRN Number: ([^\\n\\r]+)')
+       WHERE grn_number IS NULL
+         AND notes IS NOT NULL
+         AND notes ~ 'GRN Number: '
+    `);
+
+    await queryRunner.query(`
+      CREATE INDEX IF NOT EXISTS idx_warehouse_inventory_grn_number
+      ON freight.warehouse_inventory(grn_number)
+      WHERE grn_number IS NOT NULL
+    `);
+  }
+
+  /**
+   * Deliberately a no-op. Dropping the column is what broke these environments
+   * in the first place, and the original 1828 migration already owns its own
+   * down(). Reverting this repair must not re-introduce the outage.
+   */
+  public async down(): Promise<void> {
+    // intentionally empty
+  }
+}