tablespace PSAPSR3 is already in backup status

Hi!

I have planed an ALL-ONLINE Backup from DB13.

What does it mean and how can I proceed to backuo these tablespaces?

Here is the error I am getting:

BR0328E Database file E:\ORACLE\DEV\SAPDATA1\SR3_1\SR3.DATA1 of tablespace PSAPSR3 is already in backup status

BR0328E Database file E:\ORACLE\DEV\SAPDATA1\SR3_2\SR3.DATA2 of tablespace PSAPSR3 is already in backup status

.............................................................................

And second question:

<b>Which form should have the parameter stage_root_dir, if a do a backup from windows to unix via FTP?</b>

stage_root_dir=SAP/backup or

stage_root_dir=SAP\backup

Thank you very much

regards