The total transaction count (for progress estimation) is counted as the known count at the last checkpoint, plus an estimated number per day.

The last checkpoint is now 996 days ago, and its estimated 60000 transactions per day leads to a total estimate of 96M transactions, while the real number is around 183M.

Fix this by updating the count, timestamp, and rate of transactions... with or without adding a new checkpoint.
{
    
    
    
    if (consensusParams.vDeployments[id].nTimeout > 0)
        bip9_softforks.push_back(Pair(name, BIP9SoftForkDesc(consensusParams, id)));
}
UniValue getblockchaininfo(const JSONRPCRequest& request)
{
    if (request.fHelp || request.params.size() != 0)
        throw runtime_error(
            "getblockchaininfo\n"
            "Returns an object containing various state info regarding blockchain processing.\n"
            "\nResult:\n"
            "{\n"
            "  \"chain\": \"xxxx\",        (string) current network name as defined in BIP70 (main, test, regtest)\n"
            "  \"blocks\": xxxxxx,         (numeric) the current number of blocks processed in the server\n"
            "  \"headers\": xxxxxx,        (numeric) the current number of headers we have validated\n"
            "  \"bestblockhash\": \"...\", (string) the hash of the currently best block\n"
            "  \"difficulty\": xxxxxx,     (numeric) the current difficulty\n"
            "  \"mediantime\": xxxxxx,     (numeric) median time for the current best block\n"
            "  \"verificationprogress\": xxxx, (numeric) estimate of verification progress [0..1]\n"