ba89201f_Including_Cayenne_in_a_Project__cdbimport_optional_parameters_Description
[Name] overwriteExisting [Type] boolean [Description] 
Indicates whether existing DB and object entities should be overwritten. This is an all-or-nothing setting. If you need finer granularity, use the CayenneModeler. Default is "true".
Chapter 4. Including Cayenne in a Project
Description