Hi! Thank you for your question.
"Elsewhere" refers to outside of this jam. We're sorry this didn't come across as intended. We'll make sure to revise the rule for clarity!
Generally, we're only accepting games that are being released for the first time during the jam period. However, there is an exception for re-releases that have significant enough changes from the previously released version. In this case, we like to trust entrants' judgement on whether their submission differs enough to qualify.