Cause

Rough handling and dubious terrain.

Solution

1. Remove the existing wheel(s). To do this open the inner lining of the case by unzipping it from the bottom up.

2. Then remove the protective sticker from the inner wheel bracket and you will see the screws. Unscrew them and the wheel will be able to be removed.

3. Next, place the new inner bracket and wheel in place and screw it in!

Phrasing

This issue is easily repairable and takes no longer than 10-15 minutes to do!