Oracle® Database 11g / 12c / 18c error codes ORA-01567: dropping log [string] would leave less than 2 log files for instance [string] (thread [string])

ORA-01567: dropping log [string] would leave less than 2 log files for instance [string] (thread [string])

Oracle Error Code: ORA-01567

Cause: Dropping all the logs specified would leave fewer than the required two log files per enabled thread.

Action: Either drop fewer logs or disable the thread before deleting the logs. It may be possible to clear the log rather than drop it.