Validation failure on batches.json when using Django web interface

[miagrbr-MC]

Describe the bug
When trying to add a batch on the Django administration web interface, the "Data Ready?" and "Data Valid?" column always shown a red (x), however when uploading the same batch at the commandline as part of creating a campaign, the batch shows green checkmarks under the aforementioned colums in the Django administration web interface.

To Reproduce
Steps to reproduce the behavior:

1. Create a new campaign by running the following at the commandline:

python3 manage.py StartNewCampaign Examples/MQM+ESA/manifest_esa.json     --batches-json Examples/MQM+ESA/batches_esa.json     --csv-output Examples/MQM+ESA/output_esa.csv

2. Go to http://127.0.0.1:8000/admin/Campaign/campaigndata/
3. Click "ADD BATCH" and upload the /Examples/MQM+ESA/batches_esa.json file
4. Select eng_deu_example15esa as market
5. Select eng->deu/example15esa["1.0"] as metadata
6. Click "SAVE"
7. When navigating back to http://127.0.0.1:8000/admin/Campaign/campaigndata/ the batch that was uploaded using the web interface will show as follows:

While the batch upoaded in step 1 will look as follows:

Expected behavior
Both batches are expected to show green ticks for the "Data Ready?" and "Data Valid?" columns.

Screenshots
See above

Desktop (please complete the following information):

• OS: Microsoft Windows 11 Pro
• Browser: Chrome
• Version: 131.0.6778.265 (Official Build) (64-bit)

Smartphone (please complete the following information):
n/a

Additional context
I am using the develop branch