diff --git a/constants/chainIds.json b/constants/chainIds.json
index 22e0513ef9..4347dbd0fd 100644
--- a/constants/chainIds.json
+++ b/constants/chainIds.json
@@ -9,7 +9,6 @@
   "30": "rsk",
   "40": "telos",
   "50": "xdc",
-  "51": "xdcapothem",
   "52": "csc",
   "55": "zyx",
   "56": "binance",