When trying to edit a module generated off a project pom, the following error
results not matter what information is entered and saved:

javax.servlet.ServletException: null
org.kohsuke.stapler.Stapler.invoke(Stapler.java:279)
org.kohsuke.stapler.MetaClass$15.dispatch(MetaClass.java:361)
org.kohsuke.stapler.Stapler.invoke(Stapler.java:270)
org.kohsuke.stapler.MetaClass$9.doDispatch(MetaClass.java:240)
org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:30)
org.kohsuke.stapler.Stapler.invoke(Stapler.java:270)
org.kohsuke.stapler.Stapler.invoke(Stapler.java:207)
org.kohsuke.stapler.Stapler.service(Stapler.java:72)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

root cause

java.lang.NumberFormatException: null
java.lang.Integer.parseInt(Integer.java:415)
java.lang.Integer.parseInt(Integer.java:497)
hudson.scm.SCMS.parseSCM(SCMS.java:30)
hudson.model.AbstractProject.submit(AbstractProject.java:548)
hudson.maven.MavenModule.submit(MavenModule.java:255)
hudson.model.Job.doConfigSubmit(Job.java:510)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:585)
org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:95)
org.kohsuke.stapler.Function.bindAndinvoke(Function.java:51)
org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:63)
org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:30)
org.kohsuke.stapler.Stapler.invoke(Stapler.java:270)
org.kohsuke.stapler.MetaClass$15.dispatch(MetaClass.java:361)
org.kohsuke.stapler.Stapler.invoke(Stapler.java:270)
org.kohsuke.stapler.MetaClass$9.doDispatch(MetaClass.java:240)
org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:30)
org.kohsuke.stapler.Stapler.invoke(Stapler.java:270)
org.kohsuke.stapler.Stapler.invoke(Stapler.java:207)
org.kohsuke.stapler.Stapler.service(Stapler.java:72)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)