How Do I post a Duplicate picture with Followliker?

Im using FL to post pictures on my pages.Normally I post 4 pics a day and my folder contains 40 pictures.Like you guys know FL wont post the same picture twice.Is there something that could help me recycle the 40 pictures so FL start to post the same photos again after.

You will have to change the file name of the pictures. There's free software that can automatically
do that but the names escape me at the moment. Just do Google search.