that status field is the SCORM cmi.core.lesson_status - this is set by your SCORM package, It is up to your SCORM authoring tool to set how this field is set based on conditions within your package.

you should take a look here:
http://docs.moodle.org/22/en/SCORM_FAQ#Handling_of_Multiple_Attempts

A "new attempt" in SCORM is only available if the status is "complete" or "passed" otherwise each time the user enters the SCORM they will be working within the same initial attempt.

hope that's useful.