diff --git a/src/exchangedb/exchange_do_batch2_reserves_in_insert.sql b/src/exchangedb/exchange_do_batch2_reserves_in_insert.sql
index d341642f9..2100f7de6 100644
--- a/src/exchangedb/exchange_do_batch2_reserves_in_insert.sql
+++ b/src/exchangedb/exchange_do_batch2_reserves_in_insert.sql
@@ -182,13 +182,13 @@ 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 e2ab133bd..15d8ef6ff 100644
--- a/src/exchangedb/exchange_do_batch4_reserves_in_insert.sql
+++ b/src/exchangedb/exchange_do_batch4_reserves_in_insert.sql
@@ -249,16 +249,17 @@ BEGIN
     END IF;
   k=k+1;
   END LOOP;
-/*  IF transaction_duplicate
+
+  IF transaction_duplicate
   OR transaction_duplicate2
   OR transaction_duplicate3
   OR transaction_duplicate4
   THEN
     RAISE EXCEPTION 'Reserve did not exist, but INSERT into reserves_in gave conflict';
-
+    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 2c61bfedf..6076f3299 100644
--- a/src/exchangedb/exchange_do_batch8_reserves_in_insert.sql
+++ b/src/exchangedb/exchange_do_batch8_reserves_in_insert.sql
@@ -421,7 +421,7 @@ BEGIN
     END IF;
   k=k+1;
   END LOOP;
-/*  IF transaction_duplicate
+  IF transaction_duplicate
   OR transaction_duplicate2
   OR transaction_duplicate3
   OR transaction_duplicate4
@@ -433,7 +433,7 @@ BEGIN
     CLOSE curs_transaction_existed;
     ROLLBACK;
     RETURN;
-  END IF;*/
+  END IF;
   CLOSE curs_transaction_existed;
   RETURN;
 END $$;
diff --git a/src/exchangedb/exchange_do_batch_reserves_in_insert.sql b/src/exchangedb/exchange_do_batch_reserves_in_insert.sql
index 7c11bee83..4ae7f68a2 100644
--- a/src/exchangedb/exchange_do_batch_reserves_in_insert.sql
+++ b/src/exchangedb/exchange_do_batch_reserves_in_insert.sql
@@ -94,9 +94,9 @@ transaction_duplicate= TRUE;
     RETURN;
   ELSE
     -- Unhappy...
---    RAISE EXCEPTION 'Reserve did not exist, but INSERT into reserves_in gave conflict';
+    RAISE EXCEPTION 'Reserve did not exist, but INSERT into reserves_in gave conflict';
     transaction_duplicate = TRUE;
---    ROLLBACK;
+    ROLLBACK;
     RETURN;
   END IF;
   RETURN;
diff --git a/src/exchangedb/pg_batch2_reserves_in_insert.c b/src/exchangedb/pg_batch2_reserves_in_insert.c
index 90848e0e6..34c15d1da 100644
--- a/src/exchangedb/pg_batch2_reserves_in_insert.c
+++ b/src/exchangedb/pg_batch2_reserves_in_insert.c
@@ -764,6 +764,8 @@ TEH_PG_batch2_reserves_in_insert (void *cls,
       t_duplicate |= transaction_duplicate[i+1];
       t_duplicate |= transaction_duplicate[i+2];
       t_duplicate |= transaction_duplicate[i+3];
+      //  fprintf(stdout, "%ld %ld c:%d t:%d %d %d %d\n", reserve_uuid[i], reserve_uuid[i+1], conflicts[i], t_duplicate, t_duplicate, transaction_duplicate[i+2], transaction_duplicate[i+3]);
+
       i += 4;
       break;
     case 3:
@@ -791,7 +793,6 @@ TEH_PG_batch2_reserves_in_insert (void *cls,
       t_duplicate |= transaction_duplicate[i];
       t_duplicate |= transaction_duplicate[i+1];
 
-      //fprintf(stdout, "%ld %ld c:%d t:%d\n", reserve_uuid[i], reserve_uuid[i+1], conflicts[i], transaction_duplicate[i]);
       i += 2;
       break;
     case 1:
@@ -835,13 +836,19 @@ TEH_PG_batch2_reserves_in_insert (void *cls,
       return cs;
     }
   }
-
   if (! need_update)
   {
     goto exit;
   }
+  /*  fprintf(stdout, "t : %d", t_duplicate);
   if (t_duplicate)
-    goto exit;
+    {
+      GNUNET_break (0);
+      TEH_PG_rollback (pg);
+      return GNUNET_DB_STATUS_HARD_ERROR;
+    }
+  */
+
   // begin serializable
   {
     if (GNUNET_OK !=
@@ -864,7 +871,6 @@ TEH_PG_batch2_reserves_in_insert (void *cls,
     {
       if (! conflicts[i])
         continue;
-      //   fprintf(stdout, "%d\n", conflicts[i]);
       {
         bool duplicate;
         struct GNUNET_PQ_QueryParam params[] = {
@@ -889,7 +895,7 @@ TEH_PG_batch2_reserves_in_insert (void *cls,
         if (qs3<0)
           {
             GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
-                        "Failed to update (%d)\n",
+                        "Failed to update reserves (%d)\n",
                         qs3);
             results[i] = qs3;
             return qs3;
diff --git a/src/exchangedb/test_exchangedb_populate_table.c b/src/exchangedb/test_exchangedb_populate_table.c
index ae1d5bdfa..d67d1307a 100644
--- a/src/exchangedb/test_exchangedb_populate_table.c
+++ b/src/exchangedb/test_exchangedb_populate_table.c
@@ -538,7 +538,6 @@ run (void *cls)
             plugin->insert_refund (plugin->cls,
                                    &ref));
                                    }*/
-    
     }
 
   result = 0;