I would consider a redo.
ORA-16607 on SHOW CONFIGURATION Problem: After creating your configuration and adding the standby database, you issued a SHOW CONFIGURATION as suggested. Instead of the expected SUCCESS, the report ends up with Warning: ORA-16607: one or more databases have failed Checking with err ora 16607 was not very helpful (see above), and you neither can find anything in your alert.log nor any trace files. Cause: Probably at least one of your databases is not using an SPFILE. Solution: Check whether your databases have an SPFILE associated. It is usually located in $ORACLE_HOME/dbs/spfile$ORACLE_SID.ora. If it does not exist, create it: Login to your database as SYSDBA, and issue the command CREATE SPFILE FROM PFILE;. Even if it exists, to make the database using it you need to restart the instance - it must be used already at startup.