Table redefinition ends with ORA-02448
ORA-02448 during DBMS_REDEFINITION.finish_redef_table ERROR at line 1:
  ORA-02448: constraint does not exist


CAUSE


  Bug 18258770 : ORA-2448 ON DBMS_REDEFINITION.FINISH_REDEF_TABLE


Here is the document link(MOS account required)
ORA-02448 During DBMS_REDEFINITION.finish_redef_table (Doc ID 2021843.1)