diff --git a/op-mantle-fullnode.yml b/op-mantle-fullnode.yml
index 7f624104..139f87e1 100644
--- a/op-mantle-fullnode.yml
+++ b/op-mantle-fullnode.yml
@@ -107,7 +107,6 @@ services:
       OP_NODE_INDEXER_SOCKET: 'da-indexer-api.mantle.xyz:443'
       OP_NODE_INDEXER_ENABLE: 'true'
       OP_NODE_L2_BACKUP_UNSAFE_SYNC_RPC: https://rpc.mantle.xyz
-      OP_NODE_L2_BACKUP_UNSAFE_SYNC_RPC: ${MANTLE_L2_BACKUP_RPC:-https://rpc.mantle.xyz}
       OP_NODE_P2P_STATIC: '/dns4/peer0.mantle.xyz/tcp/9003/p2p/16Uiu2HAmKVKzUAns2gLhZAz1PYcbnhY3WpxNxUZYeTN1x29tNBAW,/dns4/peer1.mantle.xyz/tcp/9003/p2p/16Uiu2HAm1AiZtVp8f5C8LvpSTAXC6GtwqAVKnB3VLawWYSEBmcFN,/dns4/peer2.mantle.xyz/tcp/9003/p2p/16Uiu2HAm2UHVKiPXpovs8VbbUQVPr7feBAqBJdFsH1z5XDiLEvHT'
       OP_NODE_SEQUENCER_ENABLED: 'false'
       OP_NODE_P2P_AGENT: 'mantle'