Hi
I am trying to change some of my sales from per kg to per unit. I need to keep the same Item Number in my list, and was advised to add a 'Z' in front of my existing name. There by changing it, so i can reuse.
However it appears i am unable to do this. When I open my item profile card, I can not type in the Item Number.
I have tried with it being active and inactive.
Can someone point out what I am doing wrong. I really need to keep the same Item Number/Name that already exists. I.e. see below, i want to add the 'Z' in front of HEALTH - Recycling. I dont use Inventory.

Thank you
Pauline