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Internal Server Error when updating project that doesn't have model

2018-03-26 15:58:58,429 ERROR [http-bio-8080-exec-128] (BaseController.java:45) - java.lang.NullPointerException
java.lang.NullPointerException
    at lcsb.mapviewer.services.impl.ProjectService.updateProject(ProjectService.java:1354)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)