CREATE TABLE table_29709 ("Conference" TEXT, "Old membership total" FLOAT, "New membership total" FLOAT, "Net change" TEXT, "Members added" FLOAT, "Members lost" FLOAT)

What is the lowest number of members lost when the net change is 1?
SELECT MIN("Members lost") FROM table_29709 WHERE "Net change" = '−1'
SELECT MIN("Members lost") FROM "table_29709" WHERE "Net change" = '−1'