Finally, I found the sollution on smartBear api docs . There was something like CloneMockServiceAction.cloneToAnotherProject(WsdlMockService mockService, String name, WsdlProject targetProject, String description)
which description seems deprecated because current parameters are different ->
cloneToAnotherProject(WsdlMockService mockService, String targetProjectName, String name, String description)
To solve my problem I used same method that cloneToAnotherProject used inside and i did this on target Project object
importMockService(WsdlMockService mockService, String name, boolean createCopy, String description)