Wrong Repo Size Shown in Gitlab.com


My Gitlab page shows this notice at the top ‘The size of this repository (12 GB) exceeds the limit of 9.8 GB by 2.5 GB.’

If I download the whole repo as a zip it is only 20,000 KB. There are only 58 commits which are all small.

What is going on here and how do I find where the large data is as it isn’t a file in the repo. Or is there a way to just delete whatever is causing the bloat.

Thanks. If you need anymore information please let me know.