creation user modified by script

[LVA]

I have a creation user field that is set to prohibit modification of value. If I try to modify this field on a layout a message will splash to inform the user it's not possible to modify this field. If for any reason or even a mistake on a script this field is modified by a script , data in it will change. How can this be possible ?

[jasonwood]

The "Set Field" script step can get around "prohibit modification of value".