diff --git a/src/main.cpp b/src/main.cpp
index 95fdbebae..a352b1ab6 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -4425,7 +4425,15 @@ bool AcceptBlockHeader(int32_t *futureblockp,const CBlockHeader& block, CValidat
         if (ppindex)
             *ppindex = pindex;
         if ( pindex != 0 && pindex->nStatus & BLOCK_FAILED_MASK )
-            return state.Invalid(error("%s: block is marked invalid", __func__), 0, "duplicate");
+        {
+            if ( ASSETCHAINS_CC == 0 )
+                return state.Invalid(error("%s: block is marked invalid", __func__), 0, "duplicate");
+            else
+            {
+                fprintf(stderr,"reconsider block %s\n",hash.GetHex().c_str());
+                pindex->nStatus &= ~BLOCK_FAILED_MASK;
+            }
+        }
         /*if ( pindex != 0 && hash == komodo_requestedhash )
         {
             fprintf(stderr,"AddToBlockIndex A komodo_requestedhash %s\n",komodo_requestedhash.ToString().c_str());