diff --git a/src/Chainweb/Version.hs b/src/Chainweb/Version.hs
index 018ff92002..8b4722a7ce 100644
--- a/src/Chainweb/Version.hs
+++ b/src/Chainweb/Version.hs
@@ -752,7 +752,6 @@ vuln797Fix Mainnet01 cid h
     | cid == unsafeChainId 7 = h >= 121451
     | cid == unsafeChainId 8 = h >= 121452
     | cid == unsafeChainId 9 = h >= 121451
-    | otherwise = error $ "invalid chain id " <> sshow cid
 vuln797Fix _ _ _ = True
 {-# INLINE vuln797Fix #-}
 
@@ -777,7 +776,7 @@ coinV2Upgrade Mainnet01 cid h
     | cid == unsafeChainId 7 = h == 140809
     | cid == unsafeChainId 8 = h == 140808
     | cid == unsafeChainId 9 = h == 140808
-    | otherwise = error $ "invalid chain id " <> sshow cid
+    -- new chains on mainnet start already with v2 deployed in the genesis block
 coinV2Upgrade Testnet04 cid h
     | chainIdInt @Int cid >= 10  && chainIdInt @Int cid < 20 = h == 337000
     | otherwise = h == 1