error.duplicate.report.job.output.filename Issue

[cgriefer]

Hey all.

I'm currently writing a script that uses the Jasper API (v2) to edit a job definition via the endpoint at https://community.jaspersoft.com/documentation/jasperreports-server-web-services-guide/v56/editing-job-definition.

Running into an issue where I'm getting a 400 returned with an error stating that the baseOutputFilename is a dupe. However, it is not. 

The value that I'm passing is 02_13_19OnDemandActivityReport. In that folder, there is no other job that uses that baseOuptutFilename. There is one that is 02_13_19OnDemandActivityReportCSU. Is that similar enough that Jasper thinks they're dupes? 

Does anybody know how Jasper determines dupes under the hood so that I can avoid hitting issues like these?

Thanks in advance.