All products reverted to using manual stock management

[BillyHardcore]

Hello all

 

I have somewhat of a problem with the fact that suddenly all my product quantity settings no longer use the available product, but rather the tickmark has set itself to using manual quantities.

 

Do you know of why, and more importantly how I can restore all my 2000 products without having to manually set the tick on every product?

 

Edit:

Thought I might mention the actual quantities in my warehouse are still correct in the database.

Edited January 24, 2013 by BillyHardcore (see edit history)