From 50813c103ece22f9873c9f16e08b42170ff2599f Mon Sep 17 00:00:00 2001
From: stoffu <stoffu@protonmail.ch>
Date: Thu, 22 Aug 2019 10:53:21 +0900
Subject: [PATCH] ringdb: fix bug in blackballing

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

diff --git a/src/wallet/ringdb.cpp b/src/wallet/ringdb.cpp
index 8da95de7b..b7efdd75c 100644
--- a/src/wallet/ringdb.cpp
+++ b/src/wallet/ringdb.cpp
@@ -424,7 +424,7 @@ bool ringdb::blackball_worker(const std::vector<std::pair<uint64_t, uint64_t>> &
     {
       case BLACKBALL_BLACKBALL:
         MDEBUG("Marking output " << output.first << "/" << output.second << " as spent");
-        dbr = mdb_cursor_put(cursor, &key, &data, MDB_APPENDDUP);
+        dbr = mdb_cursor_put(cursor, &key, &data, MDB_NODUPDATA);
         if (dbr == MDB_KEYEXIST)
           dbr = 0;
         break;