Repositories storage size exceeds limit

Hi

Currently our account has approx 4gig of free space. Everyone on the team started getting the following:

Enumerating objects: 27, done.
Counting objects: 100% (27/27), done.
Delta compression using up to 12 threads
Compressing objects: 100% (11/11), done.
Writing objects: 100% (14/14), 1.84 KiB | 472.00 KiB/s, done.
Total 14 (delta 7), reused 0 (delta 0)
error: remote unpack failed: error Repositories storage size exceeds limit -20974663222B

Not user why the limit is such a huge negative number?  Any idea on how to fix?

Much appreciated!