CLEAR INSTANTIATION CSN
Use CLEAR INSTANTIATION CSN on your target database to
                clear (reverse) the instantiation CSN manually. This command requires
                    DBLOGIN where the user is the default Oracle GoldenGate
                schema.
                  
Syntax
CLEAR INSTANTIATION CSN FOR [schema.]table FROM source-database-nameExample
CLEAR INSTANTIATION CSN FOR hr.employees FROM pdbeast.com