> For the complete documentation index, see [llms.txt](https://docs.sportradar.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sportradar.com/uof/support-and-history/faq/why-do-i-receive-multiple-updates-to-markets-with-the-same-id-in-the-odds_change-message.md).
# Why do I receive multiple updates to markets with the same id in the odds\_change message?
A market is uniquely defined by its *id* AND *specifiers*. Many markets have multiple lines, and the Betradar system provides odds updates for multiple lines in the same odds-update (e.g. the totals markets). More details on markets and specifiers may be found in the [concept](/uof/introduction/key-concepts.md) section.
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