ST-2026-058 · Runtimes & developer platforms
Cloudflare requires SQLite for new Durable Object namespaces on affected accounts
Accounts without an existing KV-backed namespace must create new Durable Object namespaces with SQLite, and legacy new_classes deployments fail for those accounts.
Cloudflare WorkersDurable ObjectsSQLitestorage
Previous state
Affected accounts could attempt to create KV-backed namespaces through new_classes.
Current state
Affected new namespaces must use new_sqlite_classes; legacy-KV accounts retain bounded compatibility for now.
Affected users
Who needs to care
Workers accounts with no existing KV-backed Durable Object namespace.
Required response
What to do
Use new_sqlite_classes for new deployments and test account-specific compatibility before rollout.
Evidence boundary
What the source does not prove
Accounts already using the legacy KV backend retain the documented ability to create KV-backed namespaces for now.
Lifecycle history
Dated event sequence
- SQLite default enforced
Affected new namespace creation moved to SQLite.
Evidence ledger
First-party sources
- 01Cloudflare Developers — Workers changelog
Official product changelog · 2026-07-09
Open official source ↗