Oracle Solution for Error ora-19861

ORA-19861: additional backup pieces cannot be validated in this conversation

What triggered the Error:

e user tried to add new pieces to the list of files being validated after the validation had already been performed. In a validation conversation, the list can only be validated once.

What should we do to fix it:

d all the backup pieces to the list before validating, or start a new validation conversation for the remaining pieces.