---
page_type: error
code: 45731
message: "45731: Pre-engagement data too large. "
level: ERROR
product: Flex
---

## Description

Failed to create webchat conversation. Pre-engagement data too large.

### Possible Causes

Pre engagment data is over the maximum allowed size of 16KB.

### Possible Solutions

Ensure pre-engagement data is less than 16KB.

Read more about creating valid attributes [here.](/docs/conversations/attributes)