[Vtigercrm-developers] make a field unique

[lucia digirolamo]

Hi, I need the name of my projects in the Project module to be unique.. 
basically what I need is that when I enter a name  (in projects) that 
already exists, I cannot save the record and some message appears saying 
that the name already exists (i'm using vtiger 630, by the way)

can somebody tell me how can I achieve this?

thanks