materialized view error
the mview use fast refresh, but often error. the error is :
ORA-12012: error on auto execute of job 41
ORA-12008: error in materialized view refresh path
ORA-08102: index key not found, obj# 55209, file 8, block 481 (2)
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2255
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2461
ORA-06512: at "SYS.DBMS_IREFRESH", line 683
ORA-06512: at "SYS.DBMS_REFRESH", line 195
ORA-06512: at line 1