I saw a similar thread on the beta forum. It performs the desired change, but always ends with the error. It just started in 12.11.
Spooled SQL:
ALTER DATABASE
DATAFILE ‘/db01/ORACLE/tundaimx/system01.dbf’
AUTOEXTEND ON
NEXT 1M
MAXSIZE 8G;
ALTER SESSION SET CONTAINER =;
Error: ORA-02248: invalid option for ALTER SESSION