Error: Ledger has invalid close_time property

[pkcs8]

2024-05-25T21:11:06+02:00 ERR Ledger has invalid close_time property ledger_index=88237188
2024-05-25T21:11:10+02:00 ERR Ledger has invalid close_time property ledger_index=88237189

Investigate ledger number 88237188, 88237189 and several others for invalid close_time property.