[Transverse] Error when duplicating an entity if it contains attachments, when attachments are outsourced

Affected version : 6.0.1

Observed behaviour

When attachments are not stored in the database but externalised, an error appears when you try to copy/paste an entity containing an attachment (for example a test case or a requirement).

Expected result

It should be possible to duplicate an entity from the library, even if the attachments are externalised