ORA-46699：cannot create a keystore

错误原因：A keystore could not be created. A combination of the following conditions prevented the operation:1. The pluggable database was not open in read/write mode. Note that the pluggable database needs to be open in read/write mode for the KEYSTORE_MODE configuration of the pluggable database to be automatically changed to ISOLATED during the ADMINISTER KEY MANAGEMENT CREATE KEYSTORE command.2. The KEYSTORE_MODE configuration of the pluggable database was UNITED (rather than ISOLATED).