Depreciation below zero

Dear Experts,

how tin an plus beryllium depreciated beneath zero (after reaching the extremity of utile life) successful S4 HANA Public Cloud? I tried depreciation keys LINA and LINC, some halt calculating depreciation values aft the publication worth of zero is reached. The emblem "Negative values allowed" is set. Is determination thing other I request to consider? 

Thank you successful advance!

Best regards,

Niklas