Well, that Patch 4 has been released for Assassin’s Creed Unity. And fittingly, it’s come with yet another problem for Ubisoft.

The regular patch is already fairly large at 6.7 GB to fix most if not all of the rest of the issues with the game. Somehow though they’ve made a mistake with the Xbox One version which means users will end up redownloading the entire game. All 40GB worth of it. Yikes.

Writing about the issue on the official Assassin’s Creed site Ubisoft stated “Unfortunately, an issue with the patch downloading process is replacing the entire game instead of just the parts affected by the patch. This is obviously not the expected behavior, and we apologize that many of you will have to wait longer than expected to complete this download.”

They went on to say they are working with Microsoft to find the problem so the download size can be cut down and that at the moment they have no ETA on when players can expect this to be. However if you own the disc version, you can simply uninstall then reinstall and it should download and install just the 6.7 GB patch instead of trying to download the whole game over again.

Patch 4 comes with many fixes, including some to framerate and performance issues that required an entire rebuild of the Paris map which accounts for the large size even of just the patch alone.