When cloning a PDB in the current container, the error ORA-46697 may be returned:
SQL> CREATE PLUGGABLE DATABASE pdb2 FROM pdb1 ;
CREATE PLUGGABLE DATABASE pdb2 FROM pdb1
*
ERROR at line 1:
ORA-46697: Keystore password required.
Since the PDB is encrypted, the TDE password should be speficied:
SQL> CREATE PLUGGABLE DATABASE pdb2 FROM pdb1 KEYSTORE IDENTIFIED BY "<tde password>" PARALLEL 4;
Pluggable database created.
SQL>