accidentally deleted logfiles Eve on the main site

Hello

on the main site the standby redo log groups 4, 5 and 6 were deleted accidentily:

ALTER DATABASE, DROP LOGFILE GROUP 4
Deleted Oracle managed file /opt/oracle/oradata/DB/archfiles/flashback/DB/onlinelog/o1_mf_4_77jcr8bz_.log
ALTER DATABASE, DROP LOGFILE GROUP 5
Deleted Oracle managed file /opt/oracle/oradata/DB/archfiles/flashback/DB/onlinelog/o1_mf_5_77jcrd9w_.log
ALTER DATABASE, DROP LOGFILE GROUP 6
Deleted Oracle managed file /opt/oracle/oradata/DB/archfiles/flashback/DB/onlinelog/o1_mf_6_77jcrjgt_.log

It is a standby Redo Logs and no online Redo Logs!

However, the last group of standby Redo Log on the main site is still available:

Select the type, Member of v$ logfile where type = "STANDBY" (main site):
GROUP # TYPE MEMBER
---------------------------------------------------------------------------------------------------------------------------------------------
7 /opt/oracle/oradata/SELLPROD/archfiles/flashback/DB/onlinelog/o1_mf_7_77jcrmm7_.log EVE

Select Group #, type, Member of v$ logfile where type = "STANDBY" (backup site):
GROUP # TYPE MEMBER
---------------------------------------------------------------------------------------------------------------------------------------------
4 /opt/oracle/oradata/DB/otherfiles/redo_a/stbyDB_srl0.f EVE
5 /opt/oracle/oradata/DB/otherfiles/redo_a/stbyDB_srl1.f EVE
6 /opt/oracle/oradata/DB/otherfiles/redo_a/stbyDB_srl2.f EVE
7 /opt/oracle/oradata/DB/otherfiles/redo_a/stbyDB_srl3.f EVE

DataGuard environment is set up in the maximum performance - so no errors are occurring.
Newspapers waiting for Redo on the main site are created with OMF naming conventions.

The question now is:
-It would be OK just create 3 new groups of newspaper waiting for redo (Group # 4, 5 and 6) on the main site or which would cause
some problems?
I would use the statement ALTER DATABASE add STANDBY LOGFILE GROUP 4 m SIZE. Which would create fa OMF file?

Thanks for any help
Rgds
JH

The question now is:
-It would be OK just create 3 new groups of newspaper waiting for redo (Group # 4, 5 and 6) on the main site or which would cause
some problems?

Standby Redo Logs would not be on the main database until you perform a failover operation. So, I would say, you can create 3 groups of newspaper waiting to roll forward the primary database.

I would use the statement ALTER DATABASE add STANDBY LOGFILE GROUP 4 m SIZE. Which would create fa OMF file?

The files are on OMF. So your above command would work perfectly.

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