diff --git a/src/exchangedb/exchange_do_batch2_reserves_in_insert.sql b/src/exchangedb/exchange_do_batch2_reserves_in_insert.sql
index f34a5bcfa..d1cc10415 100644
--- a/src/exchangedb/exchange_do_batch2_reserves_in_insert.sql
+++ b/src/exchangedb/exchange_do_batch2_reserves_in_insert.sql
@@ -178,13 +178,13 @@ BEGIN
       END IF;
     END IF;
   END IF;
-  IF transaction_duplicate
+/*  IF transaction_duplicate
   OR transaction_duplicate2
   THEN
     CLOSE curs_transaction_exist;
     ROLLBACK;
     RETURN;
-  END IF;
+  END IF;*/
   CLOSE curs_transaction_exist;
   RETURN;
 END $$;
diff --git a/src/exchangedb/exchange_do_batch4_reserves_in_insert.sql b/src/exchangedb/exchange_do_batch4_reserves_in_insert.sql
index ae7bee18f..1817e695a 100644
--- a/src/exchangedb/exchange_do_batch4_reserves_in_insert.sql
+++ b/src/exchangedb/exchange_do_batch4_reserves_in_insert.sql
@@ -244,7 +244,7 @@ BEGIN
   k=k+1;
   END LOOP;
 
-  IF transaction_duplicate
+  /*IF transaction_duplicate
   OR transaction_duplicate2
   OR transaction_duplicate3
   OR transaction_duplicate4
@@ -253,7 +253,7 @@ BEGIN
     ROLLBACK;
     CLOSE curs_transaction_exist;
     RETURN;
-  END IF;
+  END IF;*/
   CLOSE curs_transaction_exist;
   RETURN;
 
diff --git a/src/exchangedb/exchange_do_batch8_reserves_in_insert.sql b/src/exchangedb/exchange_do_batch8_reserves_in_insert.sql
index aa0322f44..997a7b3e2 100644
--- a/src/exchangedb/exchange_do_batch8_reserves_in_insert.sql
+++ b/src/exchangedb/exchange_do_batch8_reserves_in_insert.sql
@@ -238,7 +238,6 @@ BEGIN
      RETURNING reserve_uuid,reserve_pub)
     SELECT * FROM reserve_changes;
 
-
   WHILE k < 8 LOOP
 
     FETCH FROM curs_reserve_existed INTO i;
@@ -410,7 +409,7 @@ BEGIN
     END IF;
   k=k+1;
   END LOOP;
-  IF transaction_duplicate
+ /* IF transaction_duplicate
   OR transaction_duplicate2
   OR transaction_duplicate3
   OR transaction_duplicate4
@@ -422,7 +421,7 @@ BEGIN
     CLOSE curs_transaction_existed;
     ROLLBACK;
     RETURN;
-  END IF;
+  END IF;*/
   CLOSE curs_transaction_existed;
   RETURN;
 END $$;
diff --git a/src/exchangedb/pg_batch2_reserves_in_insert.c b/src/exchangedb/pg_batch2_reserves_in_insert.c
index 2b5c62f5e..a1fc7d5a4 100644
--- a/src/exchangedb/pg_batch2_reserves_in_insert.c
+++ b/src/exchangedb/pg_batch2_reserves_in_insert.c
@@ -116,7 +116,7 @@ insert1(struct PostgresClosure *pg,
         return qs2;
       }
     GNUNET_assert (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS != qs2);
-    if ((conflict[0]) && transaction_duplicate[0])
+    if ((! conflict[0]) && transaction_duplicate[0])
       {
         GNUNET_break (0);
         TEH_PG_rollback (pg);
@@ -221,8 +221,8 @@ insert2 (struct PostgresClosure *pg,
       : GNUNET_DB_STATUS_SUCCESS_ONE_RESULT;*/
 
     if (
-        ((conflict[0]) && (transaction_duplicate[0]))
-        ||((conflict[1]) && (transaction_duplicate[1]))
+        ((! conflict[0]) && (transaction_duplicate[0]))
+        ||((! conflict[1]) && (transaction_duplicate[1]))
         )
    {
      GNUNET_break (0);
@@ -366,10 +366,10 @@ insert4 (struct PostgresClosure *pg,
    GNUNET_assert (GNUNET_DB_STATUS_SUCCESS_NO_RESULTS != qs3);
 
     if (
-        ((conflict[0]) && (transaction_duplicate[0]))
-        ||((conflict[1]) && (transaction_duplicate[1]))
-        ||((conflict[2]) && (transaction_duplicate[2]))
-        ||((conflict[3]) && (transaction_duplicate[3]))
+        ((! conflict[0]) && (transaction_duplicate[0]))
+        ||((! conflict[1]) && (transaction_duplicate[1]))
+        ||((! conflict[2]) && (transaction_duplicate[2]))
+        ||((! conflict[3]) && (transaction_duplicate[3]))
         )
    {
      GNUNET_break (0);
@@ -600,14 +600,14 @@ insert8 (struct PostgresClosure *pg,
       : GNUNET_DB_STATUS_SUCCESS_ONE_RESULT;*/
 
     if (
-        ((conflict[0]) && (transaction_duplicate[0]))
-        ||((conflict[1]) && (transaction_duplicate[1]))
-        ||((conflict[2]) && (transaction_duplicate[2]))
-        ||((conflict[3]) && (transaction_duplicate[3]))
-        ||((conflict[4]) && (transaction_duplicate[4]))
-        ||((conflict[5]) && (transaction_duplicate[5]))
-        ||((conflict[6]) && (transaction_duplicate[6]))
-        ||((conflict[7]) && (transaction_duplicate[7]))
+        ((! conflict[0]) && (transaction_duplicate[0]))
+        ||((! conflict[1]) && (transaction_duplicate[1]))
+        ||((! conflict[2]) && (transaction_duplicate[2]))
+        ||((! conflict[3]) && (transaction_duplicate[3]))
+        ||((! conflict[4]) && (transaction_duplicate[4]))
+        ||((! conflict[5]) && (transaction_duplicate[5]))
+        ||((! conflict[6]) && (transaction_duplicate[6]))
+        ||((! conflict[7]) && (transaction_duplicate[7]))
         )
    {
      GNUNET_break (0);
@@ -710,6 +710,7 @@ TEH_PG_batch2_reserves_in_insert (void *cls,
         return qs1;
       }
      //   fprintf(stdout, "%ld %ld %ld %ld %ld %ld %ld %ld\n", reserve_uuid[i], reserve_uuid[i+1], reserve_uuid[i+2], reserve_uuid[i+3], reserve_uuid[i+4], reserve_uuid[i+5], reserve_uuid[i+6],reserve_uuid[]);
+     //   fprintf(stdout, "%d %d %d %d %d %d %d %d\n", conflicts[i], conflicts[i+1], conflicts[i+2], conflicts[i+3], conflicts[i+4], conflicts[i+5], conflicts[i+6],conflicts[]);
       need_update |= conflicts[i];
       need_update |= conflicts[i+1];
       need_update |= conflicts[i+2];
@@ -790,7 +791,7 @@ TEH_PG_batch2_reserves_in_insert (void *cls,
       need_update |= conflicts[i+1];
       t_duplicate |= transaction_duplicate[i];
       t_duplicate |= transaction_duplicate[i+1];
-
+      //     fprintf(stdout, "t : %d %d", transaction_duplicate[i], transaction_duplicate[i+1]);
       i += 2;
       break;
     case 1:
diff --git a/src/exchangedb/test_exchangedb_by_j.c b/src/exchangedb/test_exchangedb_by_j.c
index 9769d964b..0e42fbe78 100644
--- a/src/exchangedb/test_exchangedb_by_j.c
+++ b/src/exchangedb/test_exchangedb_by_j.c
@@ -107,7 +107,7 @@ run (void *cls)
         const char *sndr = "payto://x-taler-bank/localhost:8080/1";
         struct TALER_Amount value;
         unsigned int batch_size = batches[i];
-        unsigned int iterations = 16;//1024*10;
+        unsigned int iterations = 200;//1024*10;
         struct TALER_ReservePublicKeyP reserve_pubs[iterations];
         struct GNUNET_TIME_Absolute now;
         struct GNUNET_TIME_Timestamp ts;