# \#pov

**URL:** https://forum.polkadot.network/tag/pov/32.md

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## [State Trie Migration](https://forum.polkadot.network/t/state-trie-migration/852)

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**Author:** [@kianenigma](https://forum.polkadot.network/u/kianenigma)\
**Replies:** 17\
**Last updated:** [April 22, 2024, 2:48pm UTC](https://forum.polkadot.network/t/state-trie-migration/852 "2024-04-22T14:48:47Z")

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The trie format of substrate has changed recently in order to become more PoV-friendly. Once done a state\_version field has appeared in each chain’s runtime specification, where 0 is the old format, and 1 is the new form…