diff --git a/frontend/src/components/Applications/ApplicationExecutionModal.js b/frontend/src/components/Applications/ApplicationExecutionModal.js
index fcd811d..945ffe5 100644
--- a/frontend/src/components/Applications/ApplicationExecutionModal.js
+++ b/frontend/src/components/Applications/ApplicationExecutionModal.js
@@ -261,7 +261,11 @@ const ApplicationExecutionModal = ({ application, propertyDetails, onClose, onCo
       planId: application.id,
       lawnSectionId: validSectionId,
       equipmentId: validEquipmentId,
-      gpsTrack: gpsTrack, // Try simple array format
+      gpsTrack: {
+        points: gpsTrack,
+        totalDistance: totalDistance,
+        duration: duration
+      }, // Backend expects object format
       averageSpeed: Math.max(averageSpeed, 0.1), // Ensure positive number
       areaCovered: application.totalSectionArea || application.sectionArea || 0,
       notes: `Application completed via mobile tracking. Duration: ${Math.round(duration/60)} minutes`,