diff --git a/client/public/__manus__/version.json b/client/public/__manus__/version.json
index 490154a..68d81b2 100644
--- a/client/public/__manus__/version.json
+++ b/client/public/__manus__/version.json
@@ -1,4 +1,4 @@
 {
-  "version": "bb8a78b4",
-  "timestamp": 1783732106605
+  "version": "509dd73b",
+  "timestamp": 1783732495856
 }
\ No newline at end of file
diff --git a/server/_core/index.ts b/server/_core/index.ts
index e5ee2cd..b3b66d1 100644
--- a/server/_core/index.ts
+++ b/server/_core/index.ts
@@ -98,8 +98,8 @@ export async function scheduleDailyImport() {
       const retentionMonths = retentionStr ? parseInt(retentionStr, 10) : 0;
       if (retentionMonths > 0) {
         const purged = await purgeOldArticles(retentionMonths);
-        if (purged.veille > 0 || purged.aap > 0) {
-          console.log(`[Cron] Purge rétention (${retentionMonths} mois) — Veille: -${purged.veille} | AAP: -${purged.aap}`);
+        if (purged.veille > 0 || purged.aap > 0 || purged.tombstones > 0) {
+          console.log(`[Cron] Purge rétention (${retentionMonths} mois) — Veille: -${purged.veille} | AAP: -${purged.aap} | Tombstones: -${purged.tombstones}`);
         }
       }
     } catch (e) {
@@ -236,8 +236,8 @@ async function startServer() {
       const retentionMonths = retentionStr ? parseInt(retentionStr, 10) : 0;
       if (retentionMonths > 0) {
         const purged = await purgeOldArticles(retentionMonths);
-        if (purged.veille > 0 || purged.aap > 0) {
-          console.log(`[Init] Purge rétention (${retentionMonths} mois) — Veille: -${purged.veille} | AAP: -${purged.aap}`);
+        if (purged.veille > 0 || purged.aap > 0 || purged.tombstones > 0) {
+          console.log(`[Init] Purge rétention (${retentionMonths} mois) — Veille: -${purged.veille} | AAP: -${purged.aap} | Tombstones: -${purged.tombstones}`);
         }
       }
     } catch (e) {
diff --git a/server/db.ts b/server/db.ts
index a63095e..ac483bc 100644
--- a/server/db.ts
+++ b/server/db.ts
@@ -14,6 +14,7 @@ import {
   InsertIdea,
   rssFeeds,
   rssSettings,
+  processedDedupKeys,
   type InsertRssFeed,
   type InsertRssSettings,
   type ImportLog,
@@ -489,16 +490,21 @@ export async function saveRssSettings(data: Partial<Omit<InsertRssSettings, "id"
 }
 
 // ─── Purge ───────────────────────────────────────────────────────────────────
-export async function purgeOldArticles(retentionMonths: number): Promise<{ veille: number; aap: number }> {
+export async function purgeOldArticles(retentionMonths: number): Promise<{ veille: number; aap: number; tombstones: number }> {
   const db = await getDb();
   if (!db) throw new Error("Database not available");
   const cutoff = new Date();
   cutoff.setMonth(cutoff.getMonth() - retentionMonths);
   const veilleResult = await db.delete(veilleItems).where(lte(veilleItems.importedAt, cutoff));
   const aapResult = await db.delete(aapItems).where(lte(aapItems.importedAt, cutoff));
+  // Purge des tombstones (processed_dedup_keys) de plus de 6 mois
+  const tombstoneCutoff = new Date();
+  tombstoneCutoff.setMonth(tombstoneCutoff.getMonth() - 6);
+  const tombstoneResult = await db.delete(processedDedupKeys).where(lte(processedDedupKeys.processedAt, tombstoneCutoff));
   return {
     veille: (veilleResult as any).affectedRows ?? 0,
     aap: (aapResult as any).affectedRows ?? 0,
+    tombstones: (tombstoneResult as any).affectedRows ?? 0,
   };
 }