''useless SCO'' ?

Hello all! As usual, thank you in advance for your generous inputs!

Our LMS can only accept 1 SCO per manifest at the moment.

When some clients are using our product, the MANIFEST.XML contains a SCO named  "resources/resource_.html"/>  ---> See imsmanifest.xml

When I manually delete this resource, the SCORM is working ---> see imsmanifest-corrected.xml

 

What is this SCO? Was the RISE360 not well constructed? Is it a bug? Does it have an utility? We have to take it out every manifest, or SCORM doesnt show.

 

Thanks!!