diff --git a/backend/handlers/bookings/bookings.go b/backend/handlers/bookings/bookings.go
index 4b5ea35..3ad12ff 100644
--- a/backend/handlers/bookings/bookings.go
+++ b/backend/handlers/bookings/bookings.go
@@ -1998,8 +1998,9 @@ func CreateBookingHandler(w http.ResponseWriter, r *http.Request) {
 
 			// Get payment info
 			var preStartPaid float64
-//nolint:errcheck // zero value is acceptable fallback on scan failure
-			_ = db.Conn.QueryRow(r.Context(), `SELECT COALESCE(SUM(amount), 0) FROM payments WHERE booking_id = $1 AND payment_type IN ('deposit', 'full') AND status = 'completed'`, existingBooking.ID).Scan(&preStartPaid)
+if err := db.Conn.QueryRow(r.Context(), `SELECT COALESCE(SUM(amount), 0) FROM payments WHERE booking_id = $1 AND payment_type IN ('deposit', 'full') AND status = 'completed'`, existingBooking.ID).Scan(&preStartPaid); err != nil {
+				log.Printf("Failed to scan preStartPaid for booking %s: %v", existingBooking.ID, err)
+			}
 			populateDepositFields(&existingBooking, existingBooking.DepositRequired, preStartPaid)
 
 			w.Header().Set("Content-Type", "application/json")
@@ -3158,11 +3159,10 @@ func ConfirmBookingHandler(w http.ResponseWriter, r *http.Request) {
 
 	if dav.Service != nil {
 		var durationMinutes int
-//nolint:errcheck // zero value is acceptable fallback on scan failure
-		_ = db.Conn.QueryRow(r.Context(), `
+if err := db.Conn.QueryRow(r.Context(), `
 			SELECT total_duration_minutes FROM bookings WHERE id = $1
-		`, bookingID).Scan(&durationMinutes)
-		if durationMinutes == 0 {
+		`, bookingID).Scan(&durationMinutes); err != nil {
+			log.Printf("ALERT: failed to scan total_duration_minutes for booking %s: %v", bookingID, err)
 			durationMinutes = 60
 		}
 		_ = dav.Service.CreateEvent(1, dav.EventInput{
diff --git a/backend/handlers/bookings/manage.go b/backend/handlers/bookings/manage.go
index 892ad94..062ec35 100644
--- a/backend/handlers/bookings/manage.go
+++ b/backend/handlers/bookings/manage.go
@@ -413,8 +413,9 @@ func AdminCreateBookingForUserHandler(w http.ResponseWriter, r *http.Request) {
 
 				// Get deposit info — deposit_required already fetched above in the main booking query.
 				var preStartPaid float64
-//nolint:errcheck // zero value is acceptable fallback on scan failure (aggregate with COALESCE)
-				_ = db.Conn.QueryRow(r.Context(), `SELECT COALESCE(SUM(amount), 0) FROM payments WHERE booking_id = $1 AND payment_type IN ('deposit', 'full') AND status = 'completed'`, existingID).Scan(&preStartPaid)
+if err := db.Conn.QueryRow(r.Context(), `SELECT COALESCE(SUM(amount), 0) FROM payments WHERE booking_id = $1 AND payment_type IN ('deposit', 'full') AND status = 'completed'`, existingID).Scan(&preStartPaid); err != nil {
+					log.Printf("Failed to scan preStartPaid for booking %s: %v", existingID, err)
+				}
 				populateDepositFields(&existingBooking, existingBooking.DepositRequired, preStartPaid)
 
 				w.Header().Set("Content-Type", "application/json")