ORA-31527: could not find source column

admin

ORA-31527: could not find source column string for CDC change table string.string
Cause: A source column wasmissing for an imported Change Data Capture
change table.
Action: Drop the importedchange table because it is invalid. Verify that the
schema containing the source table was included in the original export. Ifneeded,
perform the export again, including the schema of the missing source table.
ORA-31528: could notfind change set string for CDC subscription string
Cause: The change set wasmissing for an imported Change Data Capture
subscription.
Action: Drop the importedsubscription because it is invalid. Verify that the
schema containing the missing change set was included in the original export.If
needed, perform the export again, including the schema of the missing changeset.
ORA