exportEra to ncli_db fails with database corrupt error #7341
Description
Describe the bug
on nec-02.ih-eu-mda1.nimbus.mainnet
nec-02% journalctl -fu nimbus-era-files-update.service
Jul 21 06:29:42 nec-02.ih-eu-mda1.nimbus.mainnet systemd[1]: Finished Update Nimbus beacon node ERA files.
Jul 21 06:29:42 nec-02.ih-eu-mda1.nimbus.mainnet systemd[1]: nimbus-era-files-update.service: Consumed 43.451s CPU time.
Jul 28 09:07:31 nec-02.ih-eu-mda1.nimbus.mainnet systemd[1]: Starting Update Nimbus beacon node ERA files...
Jul 28 09:07:47 nec-02.ih-eu-mda1.nimbus.mainnet ncli_db[3507642]: TRC 2025-07-28 09:07:47.899+00:00 state_transition: processing block, signature passed topics="chaindag" tid=3507642 file=state_transition.nim:295 signature=91c4768f blockRoot=38a50685
Jul 28 09:07:49 nec-02.ih-eu-mda1.nimbus.mainnet ncli_db[3507642]: INF 2025-07-28 09:07:49.371+00:00 Loading finalized blocks tid=3507642 file=blockchain_dag.nim:1216 finHigh=ok(12239040) finalizedHead=f5d11add:12239072
Jul 28 09:07:49 nec-02.ih-eu-mda1.nimbus.mainnet ncli_db[3507642]: ERR 2025-07-28 09:07:49.371+00:00 Head does not lead to finalized block, database corrupt? tid=3507642 file=blockchain_dag.nim:1245 head=38a50685:12239136 finalizedHead=f5d11add:12239072 tail=32138484:11182079 finalized=f860c2dd
Jul 28 09:07:49 nec-02.ih-eu-mda1.nimbus.mainnet systemd[1]: nimbus-era-files-update.service: Main process exited, code=exited, status=1/FAILURE
Jul 28 09:07:49 nec-02.ih-eu-mda1.nimbus.mainnet systemd[1]: nimbus-era-files-update.service: Failed with result 'exit-code'.
Jul 28 09:07:49 nec-02.ih-eu-mda1.nimbus.mainnet systemd[1]: Failed to start Update Nimbus beacon node ERA files.