ORA-20061 ,ORA-00604 and ORA-2017

ORA-00604: error occurred at recursive SQL level 1
ORA-20061: versioned objects have to be version disabled before being dropped
ORA-06512: at "WMSYS.WM_ERROR", line 338
ORA-06512: at "WMSYS.WM_ERROR", line 346
ORA-06512: at "WMSYS.NO_VM_DROP_PROC", line 42

One scenario where  this error is , when you try to drop TESTVERSION_LT  table

If this error is occuring and not able to drop the 'TESTVERSION_LT' table and also not able to version disable the 'TESTVERSION'

FIRST take the backup of TESTVERSION table as
create table TESTVERSION_back as select * from TESTVERSION 
 and create all the indexes on that TESTVERSION_back table
.SECOND try to delete the entry of that table   from WM$VERSIONED_TABLES table and the try to drop VIEW  TESTVERSION AND TESTVERSION_LT  TABLE


------------------------------------------------------------------------------------------------------------

ORA-00604: error occurred at recursive SQL level 1
ORA-20171: WM error: Versioned objects cannot be altered.


alter table TESTVERSION_lt add VERSION INTEGER


FIRST take the backup of TESTVERSION table as create table TESTVERSION_back as select * from TESTVERSION and create all the indexes on that TESTVERSION_back table

SECOND try to delete the entry of that table for example from WM$VERSIONED_TABLES table and the try to drop VIEW TESTVERSION AND TESTVERSION_LT TABLE

-----------------