From b733257739f60ee1a3398c04fd82b36c0b15bc2f Mon Sep 17 00:00:00 2001
From: operagxsasha <operagxsasha@gmail.com>
Date: Mon, 26 Jan 2026 10:39:04 +0200
Subject: [PATCH] chore: add safety guard for negative cycle index

---
 .../src/main/java/org/tron/core/service/MortgageService.java  | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/chainbase/src/main/java/org/tron/core/service/MortgageService.java b/chainbase/src/main/java/org/tron/core/service/MortgageService.java
index b1fd279c2db..2ee1e3b2b92 100644
--- a/chainbase/src/main/java/org/tron/core/service/MortgageService.java
+++ b/chainbase/src/main/java/org/tron/core/service/MortgageService.java
@@ -214,6 +214,10 @@ private long computeReward(long beginCycle, long endCycle, AccountCapsule accoun
     }
     if (beginCycle < endCycle) {
       for (Pair<byte[], Long>  vote : srAddresses) {
+        if (beginCycle == 0) {
+       continue;
+    }
+        
         byte[] srAddress = vote.getKey();
         BigInteger beginVi = delegationStore.getWitnessVi(beginCycle - 1, srAddress);
         BigInteger endVi = delegationStore.getWitnessVi(endCycle - 1, srAddress);