making LOG_ARCHIVE_DEST_1 become null again

I was fixing this database that I have to go through another ssh that also contains a database. (so ssh to a db server, and from there ssh to another db server).

I might have type exit one extra time. So I logged to the wrong db with sqlplus / as sysdba and from null I have done this :

------------This is original value ----

SQL> show parameter log_archive_dest

NAME                     TYPE     VALUE

------------------------------------ ----------- ------------------------------

log_archive_dest             string

log_archive_dest_1             string

log_archive_dest_10             string

log_archive_dest_11             string

----------------------------

Then I did this:

alter system set  LOG_ARCHIVE_DEST_1 = "LOCATION=USE_DB_RECOVERY_FILE_DEST"