From e687038a2b34cba711f57584cf2e91ac701de228 Mon Sep 17 00:00:00 2001
From: Avory <avorycorelli@gmail.com>
Date: Sun, 16 Nov 2025 23:29:54 +0200
Subject: [PATCH] Update GovernorCountingOverridable.sol

---
 .../governance/extensions/GovernorCountingOverridable.sol | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/contracts/governance/extensions/GovernorCountingOverridable.sol b/contracts/governance/extensions/GovernorCountingOverridable.sol
index 45a72ea780c..077a02f550b 100644
--- a/contracts/governance/extensions/GovernorCountingOverridable.sol
+++ b/contracts/governance/extensions/GovernorCountingOverridable.sol
@@ -45,6 +45,8 @@ abstract contract GovernorCountingOverridable is GovernorVotes {
 
     error GovernorAlreadyOverriddenVote(address account);
 
+    error GovernorInsufficientDelegateVotes(uint256 available, uint256 required);
+
     mapping(uint256 proposalId => ProposalVote) private _proposalVotes;
 
     /// @inheritdoc IGovernor
@@ -153,7 +155,11 @@ abstract contract GovernorCountingOverridable is GovernorVotes {
             proposalVote.voteReceipt[delegate].overriddenWeight += SafeCast.toUint208(overriddenWeight);
         } else {
             uint8 delegateSupport = delegateCasted - 1;
-            proposalVote.votes[delegateSupport] -= overriddenWeight;
+            uint256 currentVotes = proposalVote.votes[delegateSupport];
+            if (currentVotes < overriddenWeight) {
+                revert GovernorInsufficientDelegateVotes(currentVotes, overriddenWeight);
+            }
+            proposalVote.votes[delegateSupport] = currentVotes - overriddenWeight;
             emit VoteReduced(delegate, proposalId, delegateSupport, overriddenWeight);
         }