Hi, I got a problem for Special Price. I noticed that when set a value for Special Price, and the From Date/To Date to NULL via "Update attribute" function for update products, the Special Price value will show on Product Listing and detail pages. Also, the checkout process will get the Special Price value, not Regular Price value. How can I fix it? I know the easy way could be remove these Special Price values, but I don't want to do it. Thank you for your help.
