ORA-16570: operation requires restart of database ""

After successfull switchover I got  the message
ORA-16570: operation requires restart of database "".

DGMGRL> SWITCHOVER TO dbXXsb;
Performing switchover NOW, please wait...
Operation requires shutdown of instance "dbXX" on database "dbXX"
Shutting down instance "dbXX"...
ORA-01031: insufficient privileges

You are no longer connected to ORACLE
Please connect again.
Unable to shut down instance "dbXX"
You must shut down instance "dbXX" manually
Operation requires shutdown of instance "dbXX" on database "dbXXsb"
You must shut down instance "dbXX" manually
Operation requires startup of instance "dbXX" on database "dbXX"
You must start instance "dbXX" manually
Operation requires startup of instance "dbXX" on database "db07sb"
You must start instance "dbXX" manually
Switchover succeeded, new primary is "dbXXsb"
DGMGRL> SHOW CONFIGURATION;
not logged on
DGMGRL> connect /
Connected.
Error:
ORA-16570: operation requires restart of database ""
ORA-06512: at "SYS.X$DBMS_DRS", line 180
ORA-06512: at line 1

DGMGRL>
DGMGRL> exit


shutdown immediate;

startup mount;
DG Brocker starts all others.