Hello,
I have set up a discount coupon,but I want to give 10% discount for a specific category.
This needs to be done via restrictions I suppose?
But if I click on restrictions I get the following error:

1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-0, MAX_DISPLAY_RESTRICT_ENTRIES' at line 1
in:
[select * from coupon_restrict where coupon_id = '2' and category_id != '0' limit -0, MAX_DISPLAY_RESTRICT_ENTRIES]
If you were entering information, press the BACK button in your browser and re-check the information you had entered to be sure you left no blank fields.
What is wrong and what can I do to solve this problem?

I am using latest version of Zen-Cart.

Or is there maybe an addon to get a discount coupon working for a specific category?
Looking forward to get some advice.

Thanks in advance.
Richard