When user has uploaded a new asset that consists of a really long name.
Gilkes Turbine No 490 with 30hp invented by Henry Watson, Lord Armstrong of Cragside and Gilkes, credit D Burton Feature Services Ltd.jpg.jpg
It then generates slug like this:
The slug is still less than 150 characters.
However, when the it merges with the website domain and etc, the asset url becomes a really long text.