Hi,
Nicolas didn't understand your issue because when you got the error message, the inputs for the max and the min are filled with the previous values.
So when he tried, he put values in that fields, like in your screenshot.
The error message is normal because the cursor need these two values and the "dynamic display" does not assure that you will always have min and max prices.
I just create a ticket in order to improve that in the future ; I think that we can find a solution for that.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.