diff --git a/contrib/devtools/chainparams/abc/chainparams_main.txt b/contrib/devtools/chainparams/abc/chainparams_main.txt
index cd23d40ba..37b9076a9 100644
--- a/contrib/devtools/chainparams/abc/chainparams_main.txt
+++ b/contrib/devtools/chainparams/abc/chainparams_main.txt
@@ -1,4 +1,4 @@
-0000000000000000071692380d6082e48d2fbbc9e77666b49e94e96e69144145
-0000000000000000000000000000000000000000016cd7e39bb2bf267ebed471
+00000000000000001a963847cea28b1ffc0d1518a7dfaea5d4d33e884fef87da
+0000000000000000000000000000000000000000016cf42a6a0926739d5530f9
 211
 3
diff --git a/src/networks/abc/chainparamsconstants.cpp b/src/networks/abc/chainparamsconstants.cpp
index f7a20c8af..bf8813d4b 100644
--- a/src/networks/abc/chainparamsconstants.cpp
+++ b/src/networks/abc/chainparamsconstants.cpp
@@ -1,18 +1,18 @@
 /**
  * @generated by contrib/devtools/chainparams/generate_chainparams_constants.py
  */
 
 #include <chainparamsconstants.h>
 
 namespace ChainParamsConstants {
-    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("0000000000000000071692380d6082e48d2fbbc9e77666b49e94e96e69144145");
-    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000016cd7e39bb2bf267ebed471");
+    const BlockHash MAINNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("00000000000000001a963847cea28b1ffc0d1518a7dfaea5d4d33e884fef87da");
+    const uint256 MAINNET_MINIMUM_CHAIN_WORK = uint256S("0000000000000000000000000000000000000000016cf42a6a0926739d5530f9");
     const uint64_t MAINNET_ASSUMED_BLOCKCHAIN_SIZE = 211;
     const uint64_t MAINNET_ASSUMED_CHAINSTATE_SIZE = 3;
 
     const BlockHash TESTNET_DEFAULT_ASSUME_VALID = BlockHash::fromHex("000000000008afd8c37f77f1bf7316125d98a0ca261827e8db62385228ce36cc");
     const uint256 TESTNET_MINIMUM_CHAIN_WORK = uint256S("00000000000000000000000000000000000000000000006ead3eb16d8dfb35fe");
     const uint64_t TESTNET_ASSUMED_BLOCKCHAIN_SIZE = 55;
     const uint64_t TESTNET_ASSUMED_CHAINSTATE_SIZE = 2;
 } // namespace ChainParamsConstants