If you are registered as a partnership , (and you are required to file on form 1065), you would be subject to self-employment taxes. K-1's include either the amount of self-employment profit or loss in box 14. Since you have a loss, your K1- box 14a would show each partners' share of that self-employment loss.
Please see the link below for more information on form 1065 and self-employment earnings and losses.
https://www.irs.gov/instructions/i1065sk1#idm140366837093328
