I am getting an error ORA-904 while executing dbacockpit. I seems, that something is wrong with my dba_tablespaces.
The error is, that column plugged_in is missing.
The error occured after starting the preparations for an upgrade from SAP ERP 6.0 EHP6 to SAP ERP 6.0 EHP7.
I am on Oracle 12c.
Could someone tell me why this column could vanish and how do I get it back?