1.17.1 Pre-release 1 — release journal

What 1.17.1-pre1 changed for data packs, measured against 1.17, the build before it. Released 2021-06-18; development build — not a release.

💡 No measured change

Same data pack format, same registries. That is the strongest safe-for-data-packs signal a diff can give, and it is still not proof — behaviour changes and bug fixes are invisible to it.

Formats

1.171.17.1-pre1
Data pack format7.07.0
Resource pack format7.07.0
Data version27242725

Registries

No registry gained, lost or changed an entry.

The official notes

Read the 1.17.1 Pre-release 1 article on minecraft.net.

The article has no technical-changes section — it lists bug fixes only, or predates that heading.

Minecraft Wiki page for 1.17.1-pre1.

In the journal

← 1.17 · All builds · 1.17.1-pre2 →

Sources