Logical goes down for some reason and it can't be recovered.(data guard)

This is not an issue, just wanted to know how this can be done.
Logical goes down and it can't be recovered. How can one recreate the logical standby?
Is this a fresh restore of primary? what are the steps to follow?
Thanks in advance.

For Physical standby, since it's block to block identical with primary. You could use backup of primary to recover physical standby. There's usually no need to backup physical standby.
For logical standby, since you could have other schema hosted on it in addition to the one that protected by data guard. It's good idea to have separate backup from primary.
Otherwise, rebuild from primary is always an option.

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