From 2c8363bb86525fa1a3ac5d9a2fd1c5b915cbc83e Mon Sep 17 00:00:00 2001
From: jl777 <jameslee777@yahoo.com>
Date: Sat, 15 Dec 2018 08:18:10 -1100
Subject: [PATCH] Revalidate sapling activation height

---
 src/main.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index 55beec474..dab6222ab 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -4920,7 +4920,7 @@ bool AcceptBlockHeader(int32_t *futureblockp,const CBlockHeader& block, CValidat
             *ppindex = pindex;
         if ( pindex != 0 && pindex->nStatus & BLOCK_FAILED_MASK )
         {
-            if ( ASSETCHAINS_CC == 0 )
+            if ( ASSETCHAINS_CC == 0 && pindex->nHeight != mainParams.consensus.vUpgrades[Consensus::UPGRADE_SAPLING].nActivationHeight )
                 return state.Invalid(error("%s: block is marked invalid", __func__), 0, "duplicate");
             else
             {