With a private network running for several months, I accidentally called the command
horizon db clear, and then Horizon now shows:
"history_latest_ledger": 2576535, "history_elder_ledger": 1830026,
i.e. the Horizon DB now holds only transactions between ledger #1830026 ~ #2576535, in the table
At stellar-core.cfg, I have
CATCHUP_COMPLETE=true since the beginning.
Is there any way to get back the transaction prior to #1830026 to
(other than re-building Stellar-Core from new DB)