# 104006: Session continuity not guaranteed

Identifier: `session_continuity_not_guaranteed`



After an AI Transport session's channel first attached, it entered a failed, suspended, or detached state, or re-attached without resuming, so the SDK can no longer guarantee that active streams received every event.

## What you should do

Once the channel re-attaches, new messages arrive normally. The only risk is that the session may not have received some events published to the channel during the disconnection.

What to do depends on which [session](https://ably.com/docs/ai-transport/concepts/sessions.md) you are running. An agent session has already aborted every in-flight run, so re-run them (a [durable-execution framework](https://ably.com/docs/ai-transport/features/durable-execution.md) does this for you). A client session surfaces the error on its `error` event, and any per-run stream you are consuming ends with it; reload the conversation from [history](https://ably.com/docs/ai-transport/features/history.md), the durable record on the channel, to recover anything missed.

## Why it happens

The SDK relies on an unbroken channel attachment to deliver every event in order. This error is raised when, after the initial attach, the [channel](https://ably.com/docs/channels/states.md) enters FAILED, SUSPENDED, or DETACHED, or re-attaches with `resumed: false`, meaning it could not resume from where it left off, typically because the disconnection outlasted the roughly two-minute resume window. Either way some events may have been missed, so continuity can no longer be guaranteed; it does not mean events were definitely dropped. The state change that triggered it is preserved as the `cause`; for a failed resume that is the channel's own continuity error.

## What you'll see

The error is reported with code 104006 and status 500. The message names the operation and the new state, for example `unable to deliver events; channel continuity lost (suspended)` or `unable to continue; channel continuity lost (attached, resumed: false)`.