diff --git a/src/patch-map.ts b/src/patch-map.ts
index 9b3a1f1a..21b04976 100644
--- a/src/patch-map.ts
+++ b/src/patch-map.ts
@@ -1,7 +1,8 @@
-export { Patchmap } from './patchmap';
-export { UndoRedoManager } from './command/UndoRedoManager';
 export { Command } from './command/commands/base';
-export { default as Transformer } from './transformer/Transformer';
+export { UndoRedoManager } from './command/UndoRedoManager';
 export { default as State, PROPAGATE_EVENT } from './events/states/State';
-export { selector } from './utils/selector/selector';
+export { Patchmap } from './patchmap';
+export { default as Transformer } from './transformer/Transformer';
 export * from './utils';
+export { convertLegacyData } from './utils/convert';
+export { selector } from './utils/selector/selector';
diff --git a/src/utils/convert.js b/src/utils/convert.js
index 6bd0d612..f4eaf76c 100644
--- a/src/utils/convert.js
+++ b/src/utils/convert.js
@@ -68,6 +68,7 @@ export const convertLegacyData = (data) => {
       objs[key].show = false;
       objs[key].attrs = { zIndex: 20 };
       for (const value of values) {
+        const props = value.properties;
         objs[key].children.push({
           type: 'relations',
           id: value.id,
@@ -93,7 +94,13 @@ export const convertLegacyData = (data) => {
             join: 'round',
           },
           attrs: {
-            metadata: value.properties,
+            metadata: {
+              ...(() => {
+                if (!props?.props) return props;
+                const { props: nested, ...rest } = props;
+                return { ...nested, ...rest };
+              })(),
+            },
             display: key.slice(0, -1),
           },
         });
@@ -129,7 +136,10 @@ export const convertLegacyData = (data) => {
           attrs: {
             x: transform.x,
             y: transform.y,
-            metadata: props,
+            metadata: {
+              ...props,
+              ...(key === 'inverters' ? { strings: value.children } : {}),
+            },
             display: key === 'combines' ? 'combiner' : key.slice(0, -1),
           },
         });