Fix DuplicateKeyException

✅ Solution

The "DuplicateKeyException" in nexus-repository usually stems from attempting to insert a record with a key (like an ID) that already exists in a database table, violating a unique constraint usually during operations like database migrations, blob storage handling or replication tasks. To fix this, identify the duplicated key value and its source, then resolve the conflict, typically by updating the existing record instead of inserting a new one, correcting any migration scripts injecting duplicate entries, or ensuring the source doesn't generate keys that may conflict.