From 92f92658c9fab330b7f34d67fbb883d15816bc7c Mon Sep 17 00:00:00 2001
From: tangxifan <tangxifan@gmail.com>
Date: Fri, 25 Aug 2023 11:53:49 -0700
Subject: [PATCH] [core] remove useless errors

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

diff --git a/openfpga/src/annotation/fabric_tile.cpp b/openfpga/src/annotation/fabric_tile.cpp
index b9c6eaeec..6357f9813 100644
--- a/openfpga/src/annotation/fabric_tile.cpp
+++ b/openfpga/src/annotation/fabric_tile.cpp
@@ -400,7 +400,7 @@ bool FabricTile::register_pb_in_lookup(const FabricTileId& tile_id,
     return false;
   }
   /* Throw error if this coord is already registered! */
-  if (pb_coord2id_lookup_[coord.x()][coord.y()]) {
+  if (pb_coord2id_lookup_[coord.x()][coord.y()] && pb_coord2id_lookup_[coord.x()][coord.y()] != tile_id) {
     VTR_LOG_ERROR(
       "Programmable block at [%lu][%lu] has already been registered!\n",
       coord.x(), coord.y());