diff --git a/src/services/adapters/SubsquidAdapter.ts b/src/services/adapters/SubsquidAdapter.ts
index 38bede1..2b76998 100644
--- a/src/services/adapters/SubsquidAdapter.ts
+++ b/src/services/adapters/SubsquidAdapter.ts
@@ -20,7 +20,7 @@ export const SUBSQUID_ENDPOINT = 'https://squidv2s.syoul.fr/v1/graphql';
 // ---------------------------------------------------------------------------
 const SubsquidTransferNodeSchema = z.object({
   id:          z.string(),
-  blockNumber: z.number().int().positive(),
+  blockNumber: z.number().int(), // peut être négatif pour les blocs Ğ1v1 migrés
   timestamp:   z.string(), // ISO 8601 ex: "2026-03-22T14:53:36+00:00"
   amount:      z.string(), // BigInt en string, en centimes Ğ1
   fromId:      z.string().nullable(),