diff --git a/beacon_chain/networking/network_metadata.nim b/beacon_chain/networking/network_metadata.nim
index e99a05e718..4e57d52746 100644
--- a/beacon_chain/networking/network_metadata.nim
+++ b/beacon_chain/networking/network_metadata.nim
@@ -365,15 +365,7 @@ elif const_preset == "mainnet":
     for network in [
         mainnetMetadata, sepoliaMetadata, holeskyMetadata, hoodiMetadata]:
       checkForkConsistency(network.cfg)
-
-    for network in [sepoliaMetadata, holeskyMetadata, hoodiMetadata]:
       doAssert network.cfg.ELECTRA_FORK_EPOCH < FAR_FUTURE_EPOCH
-
-    doAssert mainnetMetadata.cfg.DENEB_FORK_EPOCH < FAR_FUTURE_EPOCH
-    doAssert mainnetMetadata.cfg.ELECTRA_FORK_EPOCH == FAR_FUTURE_EPOCH
-
-    for network in [
-        mainnetMetadata, sepoliaMetadata, holeskyMetadata, hoodiMetadata]:
       doAssert network.cfg.FULU_FORK_EPOCH == FAR_FUTURE_EPOCH
       doAssert ConsensusFork.high == ConsensusFork.Fulu
 
diff --git a/vendor/mainnet b/vendor/mainnet
index dd91689396..978f1794ea 160000
--- a/vendor/mainnet
+++ b/vendor/mainnet
@@ -1 +1 @@
-Subproject commit dd91689396a9824ed3c78d0576cf5d854504c25c
+Subproject commit 978f1794eada6f85bee76e4d2d5959a5fb8e0cc5