Oracle® Database 11g / 12c / 18c error codes EXP-00025: dictionary shows no column for constraint [string].number

EXP-00025: dictionary shows no column for constraint [string].number

Oracle Error Code: EXP-00025

Cause: Export failed to gather column information about the referenced constraint from the data dictionary. The constraint may have been altered.

Action: Retry the export and, if this error recurs, report it as an Export internal error to customer support.