diff --git a/VERSION b/VERSION
index de28578..91c74a5 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.7.6
+1.7.7
diff --git a/changelog.json b/changelog.json
index 5331832..73a50f0 100644
--- a/changelog.json
+++ b/changelog.json
@@ -1,5 +1,20 @@
 {
   "versions": [
+    {
+      "version": "1.7.7",
+      "date": "2026-05-12",
+      "changes": {
+        "features": [],
+        "improvements": [],
+        "fixes": [
+          "Page database (Informations sur la base): la colonne 'Plus récente' affichait 'not connected' a cause d'un tri lexicographique mixant des chaines 'not connected' et des dates ISO. Les requetes MIN/MAX excluent maintenant 'not connected'."
+        ],
+        "compatibility": [
+          "Aucun impact sur les donnees: les lignes 'not connected' restent en base, elles sont juste ignorees pour le calcul des bornes temporelles affichees"
+        ]
+      },
+      "notes": "Effet de bord du bug RTC corrige en v1.7.4: les capteurs deployes avec un rtc_save_to_db.service inactif ont accumule des lignes avec timestamp='not connected'. En tri ASCII, 'n' > '2' donc MAX(timestamp) renvoyait 'not connected' au lieu de la vraie date la plus recente."
+    },
     {
       "version": "1.7.6",
       "date": "2026-05-12",
diff --git a/html/launcher.php b/html/launcher.php
index 1682a28..141abe3 100755
--- a/html/launcher.php
+++ b/html/launcher.php
@@ -675,8 +675,11 @@ if ($type == "db_table_stats") {
                     $oldest = null;
                     $newest = null;
                     if ($count > 0) {
-                        $oldestResult = $db->query("SELECT MIN(timestamp) as ts FROM $tableName")->fetch();
-                        $newestResult = $db->query("SELECT MAX(timestamp) as ts FROM $tableName")->fetch();
+                        // Exclude 'not connected' rows: these are sensor readings collected
+                        // while the RTC service was down. They are lexicographically > real
+                        // timestamps so they corrupt MAX() (and MIN() too, less obviously).
+                        $oldestResult = $db->query("SELECT MIN(timestamp) as ts FROM $tableName WHERE timestamp != 'not connected'")->fetch();
+                        $newestResult = $db->query("SELECT MAX(timestamp) as ts FROM $tableName WHERE timestamp != 'not connected'")->fetch();
                         $oldest = $oldestResult['ts'];
                         $newest = $newestResult['ts'];
                     }