修复添加时，id残留，导致无法新增的问题

guoshilong

2022-10-26 1f9f44f19d7a53e8b784dca31f3a512e590e729b

 src/store/modules/common.js

@@ -38,6 +38,9 @@
        setpolygonsFarm: (state, data) => {
            state.polygonsFarm = data;
        },
        clear_polygon: (state) => {
            state.polygons = '';
        },
        clear_polygonsFarm: (state) => {
            state.polygonsFarm = '';
        },