ORA-03297: file contains used data beyond requested RESIZE value

SQL> select sum(bytes)/1024/1024 from dba_data_files
  2  where tablespace_name='TEMP'
  3  /

SUM(BYTES)/1024/1024
--------------------
               25148

SQL> select sum(bytes)/1024/1024 from dba_segments
  2  where tablespace_name='TEMP'
  3  /

SUM(BYTES)/1024/1024
--------------------
                6360

SQL> select round(sum(user_bytes)/1024/1024) from dba_data_files
  2  where tablespace_name='TEMP'
  3  /

ROUND(SUM(USER_BYTES)/1024/1024)
--------------------------------
                           25148

SQL> select round(sum(bytes)/1024/1024) from dba_free_space
  2  where tablespace_name='TEMP'
  3  /

ROUND(SUM(BYTES)/1024/1024)
---------------------------
                      18788