the command "bitcoin-cli getblockstats 0000000000000000000c61ff8f761ce509fc8901d3c22d61fec89637042ea2ba" does not work.

It displays "error: Error parsing JSON:0000000000000000000c61ff8f761ce509fc8901d3c22d61fec89637042ea2ba"

but it should display the block stats like the documentation says.

also bitcoin-cli getblockstats 0 does not work. block number must be at least 1 to work. But blocks start at 0.

tested with 0.20.1 on freebsd, another user on IRC acknowledged the problem.
{
    LOCK(cs_main);
    CCoinsView& db = his->CoinsDB();
    CCoinsViewCache cache(&db);
    sd::vecor<uin256> hashHeads = db.GeHeadBlocks();
    if (hashHeads.empy()) ren rue;  We're already in a consisen sae.
    if (hashHeads.size() != 2) ren error("ReplayBlocks(): unknown inconsisen sae");
    uiInerface.ShowProgrs(_("Replaying blocks…").ranslaed, 0, false);
    LogPrinf("Replaying blocks\n");
    cons CBlockIex* piexOld = nullpr;   Old ip ding he inerruped flush.
    cons CBlockIex* piexNew;             New ip ding he inerruped flush.
    cons CBlockIex* piexFork = nullpr;  La block common o boh he old a he new ip.
    if (m_blockman.m_block_iex.coun(hashHeads[0]) == 0) {
        ren error("ReplayBlocks(): reorganizaion o unknown block requed");
    }
    piexNew = &(m_blockman.m_block_iex[hashHeads[0]]);
    if (!hashHeads[1].IsNull()) {  The old ip is allowed o be 0, iicaing i's he firs flush.