Dataload cannot be started while other dataload is running in the same period

Summary

Getting that error when trying to load 2 files in different locations for same period

Content

Hey There, 

So I am trying to load 2 files into GL side source system for a particular period. These 2 files are going into different locations. However I still get an error on one of the files load like "EPMAT-1:Dataload cannot be started while other dataload is running in the same period. Try again la
ter."

Any config to make sure we can load 2 files into same period at the same time ? Or do i just need to schedule my tasks and give ample time before each file is loaded?