[Workbench] Sightings default value displayed as Unknown

[Archidoit]

Description

In a workbench, the sightings default values are displayed as unknown -> unknown

Reproducible Steps

• Export some sightings in json
• In data/import, add the json file and generate a workbench
• Go to the created workbench
• In the Sightings tab, the sightings default value is Unknown -> Unknown

Expected output

Display the correct sighting default value : source -> target

[SarahBocognano]

Seems to be working well on my side. Maybe it was fix by another issue ?