Right now there is no short position that could have been margin called, because the asset is still in black swan state.
It will be revived when either the BTS price increases so that the value of the settlement fund is higher than the collateral requirement for the existing BTWTY, or when an investor shows up and creates a bid for the missing collateral.
With 1.016 BTWTY currently in existance, a price feed of 576133 BTS/BTWTY, MCR of 175% and a settlement fund of 352693, an investor would have to offer this amount to get it revived:
1.016 * 576133 * 1.75 - 352693 = 671672 BTS
That's a lot of money. (And he'd be in danger of being margin called quickly, unless he'd put in even more.)
@EstefanTT you really should remove the override_transfer permission, or explain what you need it for. Doesn't look good.