# Blocking UI upon Savin Flattened Related Data

**URL:** <https://community.forestadmin.com/t/blocking-ui-upon-savin-flattened-related-data/6880>\
**Category:** Help me!\
**Created:** [November 28, 2023, 3:01pm UTC](https://community.forestadmin.com/t/blocking-ui-upon-savin-flattened-related-data/6880 "2023-11-28T15:01:59Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![David\_Roegiers](https://dub1.discourse-cdn.com/flex013/user_avatar/community.forestadmin.com/david_roegiers/32/1039_2.png) [@David\_Roegiers](https://community.forestadmin.com/u/David_Roegiers)\
**Post date:** [November 28, 2023, 3:02pm UTC](https://community.forestadmin.com/t/blocking-ui-upon-savin-flattened-related-data/6880/1 "2023-11-28T15:02:00Z")

</div>

## Observed behavior

Storing a new item on related data, coming from a flattened field, which contains an array is stalling the application.

 ![image](https://europe1.discourse-cdn.com/flex013/uploads/forest/original/2X/5/5ca0ec65d1846b08a8bee663b31ec40b6527de69.png)

The network request does not get sent out, it’s purely the frontend, which blocks with the failure logs below:

## Expected behavior

The item gets saved successfully.

## Failure Logs

Coming from forestadmin frontend code:

```javascript
Uncaught (in promise) TypeError: Cannot read properties of null (reading 'pushObject')
    at s.create (client-b93732334e10671ca4b12cb47bbee925.js:1:4342457)
    at v.onClick (client-b93732334e10671ca4b12cb47bbee925.js:1:1155555)
create @ client-b93732334e10671ca4b12cb47bbee925.js:1
onClick @ client-b93732334e10671ca4b12cb47bbee925.js:1

```

## Context

- Project name: jurata
- Team name: jurata
- Environment name: staging
- Database type: mongoose

```javascript
  "dependencies": {
    "@forestadmin/agent": "^1.35.16",
    "@forestadmin/datasource-mongoose": "^1.5.29",
    "@forestadmin/datasource-replica": "^1.0.42",
    "@forestadmin/plugin-flattener": "^1.0.69",
    "axios": "^1.4.0",
    "dotenv": "^16.0.1",
    "jsonwebtoken": "^9.0.0",
    "moment": "^2.29.4",
    "mongoose": "^6.10.3",
    "node-cache": "^5.1.2",
    "sqlite3": "^5.1.6",
    "stripe": "^12.10.0",
    "typescript": "^4.9.4"
  },

```

---

<div class="post-metadata">

**Author:** ![anon62739609](https://avatars.discourse-cdn.com/v4/letter/a/c2a13f/32.png) [@anon62739609](https://community.forestadmin.com/u/anon62739609)\
**Post date:** [November 28, 2023, 3:20pm UTC](https://community.forestadmin.com/t/blocking-ui-upon-savin-flattened-related-data/6880/2 "2023-11-28T15:20:48Z")

</div>

Hi @David_Roegiers,

I’m trying to reproduce your issue. I’ll get back to you

---

<div class="post-metadata">

**Author:** ![anon62739609](https://avatars.discourse-cdn.com/v4/letter/a/c2a13f/32.png) [@anon62739609](https://community.forestadmin.com/u/anon62739609)\
**Post date:** [November 28, 2023, 3:36pm UTC](https://community.forestadmin.com/t/blocking-ui-upon-savin-flattened-related-data/6880/3 "2023-11-28T15:36:10Z")

</div>

Okey I do reproduce. I will create a bug ticket.  
We will let you know as soon as a fix as been released 😉

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<div class="post-metadata">

**Author:** ![shohanr](https://dub1.discourse-cdn.com/flex013/user_avatar/community.forestadmin.com/shohanr/32/4999_2.png) [@shohanr](https://community.forestadmin.com/u/shohanr)\
**Post date:** [December 5, 2023, 3:33pm UTC](https://community.forestadmin.com/t/blocking-ui-upon-savin-flattened-related-data/6880/4 "2023-12-05T15:33:15Z")

</div>

Hi @David_Roegiers ,

The fix has been released.

Best regards,

Shohan