Can I manually clear suspend_data with JS?

I've been digging all day to find a way to manually reset user bookmarking data.

I've found a handful of people/post with a similar problem/desire and even a few legacy solutions. But nothing has worked for me in C9 (publishing to SCORM 1.2)

Note: Before you tell me to check "Never Send Resume Data," I want/need bookmarking in my project. I just want to be able to dump/reset the data (or at the very least, some peace of mind if this is impossible).

here's where I'm stuck:

Using an 'Execute JavaScript' action, the following method retrieves the Bookmarking data just fine:

When I attempt to reset "cmi.suspend_data," using an empty "" value, it returns blank, 

but then shows everything as completed again when I relaunch the course

So...  Should I be sending a different value to SCORM_CallLMSSetValue? be using a different method entirely? Am I even close?

Thanks everyone