Server Administration > Item Type Attributes > Editing Constraints
  
Editing Constraints
You can edit a constraint to change the source or constrained fields, or their values, or to customize error messages. After editing a constraint, you can also perform other edits in the type.
In the GUI, you can only edit a single constraint at a time; however, in the CLI you can perform batch edits of constraints by specifying multiple arguments. For more information on editing constraints in the CLI, see the CLI man pages.
To edit a constraint in the GUI