Post R12.2.3 adop phase cleanup error, but completed successfully

@ADZDSHOWLOG

Calling cleanup in STANDARD mode...

    Log: @ADZDSHOWLOG.sql "2018/12/11 10:21:40"

    [ERROR]     ERROR: ORA-08102: index key not found, obj

    [ERROR]     TABLE: FND_DESCR_FLEX_COL_USAGE_TL, CODE: -8102, MESSAGE: "ORA-08102: index key not found, obj

    [ERROR]     TABLE: FND_DESCR_FLEX_COL_USAGE_TL, BACKTRACE: ORA-06512: at "APPS.AD_ZD", line 60

ORA-06512: at "APPS.AD_ZD_SEED", line 66

ORA-06512: at "APPS.AD_ZD_SEED", line 1359

    [ERROR]     [CLEANUP 1:1 ddl_id=282466] ORA-08102: index key not found, obj

    [ERROR]     Failed to execute SQL statement :

                                declare

                               begin

                                  ad_zd_log.message('ad.bin.adop','WARNING','');

                               exception

                                  when others then

                                     raise_application_error(-20001,'Error while calling ad_zd_log.message(ad.bin.adop,WARNING,).' || sqlerrm);