check that your port id is not added in global.lua
doors = {
[1209] = 1211, [1210] = 1211, [1212] = 1214, [1213] = 1214, [1219] = 1220, [1221] = 1222, [1231] = 1233, [1232] = 1233, [1234] = 1236,
[1235] = 1236, [1237] = 1238, [1239] = 1240, [1249] = 1251, [1250] = 1251, [1252] = 1254...