# Multiple threads

> This page is about FlutterFlow (the app builder you use by describing your app), not FlutterFlow Studio.

URL: https://docs.flutterflow.io/ffx/several-threads

Bring other threads' pushes into a thread, answer a push that waits for your answer, and push one thread at a time.

When you work in several threads, you bring in what your other threads pushed, decide what to keep when two threads change the same thing, and push one thread at a time.

## Get changes from other threads {#bring-it-in}

After another thread pushes to your app, your other threads show a **Your app** card that names what came in, for example, "Gift cards was pushed from another thread and isn’t in this thread yet."

To bring the changes in:

1. On the **Your app** card, choose when the changes come in:
   - To bring them in now, click **Bring it in now**.
   - To wait until you push this thread, click **Later**. Your next push brings in everything that your other threads pushed.
2. If both threads changed the same thing in different ways, the agent asks which one to keep. See [Resolve conflicts](#push-waits).

After you bring the changes in, the thread's preview and the agent's next changes include it. Bringing changes in doesn't change your app: only **Push to your app** sends this thread's changes there.

## Resolve conflicts {#push-waits}

When you push a thread, the push first brings in what's new in your app. If your app and this thread changed the same thing in different ways, such as a color or a label, the agent doesn't choose for you. It pauses the push and asks a **Question**: what your app already has and which change it came from, what this thread changes, and one choice for each.

While the push waits:

- The **Push** card in the thread shows "Pushing waits for your answer".
- The button above the message box reads **Push waits for your answer**.
- In the thread list, the thread is under **Needs you**, with "Your push waits for your answer".

<Mock name="push-waits" alt="The Push card saying Pushing waits for your answer and Choose in the question below to go on, above a Question card that names the accent color the app already has and the one this thread makes, with an answer for each and the Something else… button." />

To finish the push:

1. Open the thread.
2. In the **Question** card, choose the version to keep, or enter your answer in your own words.

The agent resolves the difference as you said and continues the push.

If you send a different request instead of an answer, the agent stops the push and does what you asked. To cancel the push yourself, click **Cancel** next to **Push waits for your answer**. See [Cancel a push](https://docs.flutterflow.io/ffx/push#cancel-a-push).

## One push at a time {#one-push-at-a-time}

Only one thread can be pushed to your app at a time. While another thread's push runs:

- **Push to your app** is unavailable in your other threads. Point to it to see "“Gift cards” is being pushed; one goes at a time."
- The thread's header shows "Waiting for “Gift cards” to finish pushing".

A push that's waiting for your answer doesn't count: while it waits, your other threads can push.

When the other push finishes, push your thread as usual. See [Push](https://docs.flutterflow.io/ffx/push).

## Troubleshooting {#if-something-goes-wrong}

- ["Another thread is being pushed to your app."](https://docs.flutterflow.io/ffx/troubleshoot-push#another-push-in-progress)
- ["This thread already has everything in your app."](https://docs.flutterflow.io/ffx/troubleshoot-push#already-has-everything)
- ["This thread is being pushed, which brings it in."](https://docs.flutterflow.io/ffx/troubleshoot-push#being-pushed-brings-it-in)
- ["This thread can’t bring it in right now."](https://docs.flutterflow.io/ffx/troubleshoot-push#cant-bring-it-in)
- [Push to your app is missing or unavailable](https://docs.flutterflow.io/ffx/troubleshoot-push#why-push-is-disabled)