Oracle Error ORA-01381: Dropping log string would leave less than two log files with block size string for instance string (thread string)

Oracle Error Message

ORA-01381: Dropping log string would leave less than two log files with block size string for instance string (thread string)

Reason for the Error

The database was migrated to use a specified log block size. Dropping all the logs specified would leave fewer than the required two log files with the specified block size per enabled thread.

Solution

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