Error parsing name file if format test - name of the file - tag.pdf

a new issue appeared on email consuming process:

the email subject was like: test - name of the file - tag1,tag2

The file get in the consume directory but kills the docker consume when trying to parse it.

test - name of the file - tag1,tag2.pdf

the error is: documents.models.MultipleObjectsReturned: get() returned more than one Tag -- it returned 2!

No probleme when i test with a file named xxxx.pdf

Thank you for your help