Disabling Modifications to Saved Records
The No Change Field n user property disallows modifying a field value after Siebel CRM saves the record. It must specify the name of a business component field, not enclosed in quotes.
You can specify this user property with or without the numeric suffix. For more information, see Numbering Instances of a User Property.
You can configure Siebel CRM to modify the value for this user property, create a new instance of it, or deactivate it.