diff --git a/backend/package.json b/backend/package.json
index 7b43d2a..a0e0ffd 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vacdm-backend",
-  "version": "1.0.0",
+  "version": "1.0.2",
   "description": "",
   "main": "app.js",
   "scripts": {
diff --git a/backend/src/services/pilot.service.ts b/backend/src/services/pilot.service.ts
index 3a9032e..687afdc 100644
--- a/backend/src/services/pilot.service.ts
+++ b/backend/src/services/pilot.service.ts
@@ -100,6 +100,10 @@ export async function updatePilot(
       changesOps['vacdm.tobt_state'] = 'CONFIRMED';
     }
 
+    if (new Date(changesOps['vacdm.tobt']) <= pilot.vacdm.tobt) {
+      changesOps['vacdm.tsat'] = timeUtils.emptyDate;
+    }
+
     if (changes.vacdm?.tobt_state) {
       switch (changes.vacdm?.tobt_state) {
         case 'FLIGHTPLAN': {