diff --git a/data/grid5000/sites/sophia/clusters/esterel31/esterel31.json b/data/grid5000/sites/sophia/clusters/esterel31/esterel31.json
index 76ad1f99cba246d4f7ed49b648493de2183bf21e..6c7c3c26af767084bf9e9b0c8c488884c9b33bb0 100644
--- a/data/grid5000/sites/sophia/clusters/esterel31/esterel31.json
+++ b/data/grid5000/sites/sophia/clusters/esterel31/esterel31.json
@@ -3,7 +3,7 @@
   "created_at": "Wed, 16 Apr 2025 00:00:00 GMT",
   "exotic": false,
   "kavlan": false,
-  "manufactured_at": "2020-08-10",
+  "manufactured_at": "2020-08-09",
   "metrics": [
     {
       "description": "Default subset of metrics from Prometheus Node Exporter",
diff --git a/data/grid5000/sites/sophia/clusters/esterel31/nodes/esterel31-1.json b/data/grid5000/sites/sophia/clusters/esterel31/nodes/esterel31-1.json
index dc4085f503b6be1946b7790951875484d54f0a3e..cb7226d94668659e982b0703b14157614aff9b15 100644
--- a/data/grid5000/sites/sophia/clusters/esterel31/nodes/esterel31-1.json
+++ b/data/grid5000/sites/sophia/clusters/esterel31/nodes/esterel31-1.json
@@ -13,7 +13,7 @@
   },
   "bmc_version": "7.00.00.181",
   "chassis": {
-    "manufactured_at": "2020-08-10",
+    "manufactured_at": "2020-08-09",
     "manufacturer": "Dell Inc.",
     "name": "PowerEdge T640",
     "serial": "36ZFW53",
diff --git a/data/grid5000/sites/sophia/clusters/esterel31/nodes/esterel31-2.json b/data/grid5000/sites/sophia/clusters/esterel31/nodes/esterel31-2.json
index 21e2b3dcaefe38979d0fd3de890b491c530199a3..d3df2e4111ab4560e4b2d6b3e5cf16062b6bf676 100644
--- a/data/grid5000/sites/sophia/clusters/esterel31/nodes/esterel31-2.json
+++ b/data/grid5000/sites/sophia/clusters/esterel31/nodes/esterel31-2.json
@@ -13,7 +13,7 @@
   },
   "bmc_version": "7.00.00.181",
   "chassis": {
-    "manufactured_at": "2020-08-10",
+    "manufactured_at": "2020-08-09",
     "manufacturer": "Dell Inc.",
     "name": "PowerEdge T640",
     "serial": "46ZFW53",
diff --git a/data/grid5000/sites/sophia/clusters/esterel31/nodes/esterel31-3.json b/data/grid5000/sites/sophia/clusters/esterel31/nodes/esterel31-3.json
index 551dd0300a85b26a5d3736e22d8543bdce761e98..487e1362f5488952962093df385c90d2ffd88152 100644
--- a/data/grid5000/sites/sophia/clusters/esterel31/nodes/esterel31-3.json
+++ b/data/grid5000/sites/sophia/clusters/esterel31/nodes/esterel31-3.json
@@ -13,7 +13,7 @@
   },
   "bmc_version": "7.00.00.181",
   "chassis": {
-    "manufactured_at": "2020-08-10",
+    "manufactured_at": "2020-08-09",
     "manufacturer": "Dell Inc.",
     "name": "PowerEdge T640",
     "serial": "56ZFW53",
diff --git a/data/grid5000/sites/sophia/clusters/esterel31/nodes/esterel31-4.json b/data/grid5000/sites/sophia/clusters/esterel31/nodes/esterel31-4.json
index 3228b69f14ff7f5b87cbb7fc00ecb3cc12047076..44f84dbbee2ba45a341b74b869cbec810f39975b 100644
--- a/data/grid5000/sites/sophia/clusters/esterel31/nodes/esterel31-4.json
+++ b/data/grid5000/sites/sophia/clusters/esterel31/nodes/esterel31-4.json
@@ -13,7 +13,7 @@
   },
   "bmc_version": "7.00.00.181",
   "chassis": {
-    "manufactured_at": "2020-08-10",
+    "manufactured_at": "2020-10-21",
     "manufacturer": "Dell Inc.",
     "name": "PowerEdge T640",
     "serial": "116SF73",
diff --git a/input/grid5000/dell-product-data.yaml b/input/grid5000/dell-product-data.yaml
index ff6c11a095bff18460cbac66c3265517d640fef2..2cd2faab53c2a57caaea739ef858b1ad7b98c20c 100644
--- a/input/grid5000/dell-product-data.yaml
+++ b/input/grid5000/dell-product-data.yaml
@@ -2312,19 +2312,19 @@ sites:
         nodes:
           esterel31-1:
             chassis:
-              manufactured_at: 2020-08-10
+              manufactured_at: 2020-08-09
               warranty_end: 2027-08-10
           esterel31-2:
             chassis:
-              manufactured_at: 2020-08-10
+              manufactured_at: 2020-08-09
               warranty_end: 2027-08-10
           esterel31-3:
             chassis:
-              manufactured_at: 2020-08-10
+              manufactured_at: 2020-08-09
               warranty_end: 2027-08-10
           esterel31-4:
             chassis:
-              manufactured_at: 2020-08-10
+              manufactured_at: 2020-10-21
               warranty_end: 2027-08-10
       esterel32:
         nodes: