## Problem
The Phase 0 core index \`IDX_WORKFLOW_VERSION_ONE_ACTIVE_PER_WORKFLOW\`
is on \`(workflowId) WHERE status='ACTIVE'\`, with **no
\`workspaceId\`**. But \`core.workflowVersion\` is a shared multi-tenant
table, so this enforces "one active version per workflowId **globally
across all workspaces**" instead of per workspace.
The version backfill fails on staging with:
\`\`\`
duplicate key value violates unique constraint
"IDX_WORKFLOW_VERSION_ONE_ACTIVE_PER_WORKFLOW"
Detail: Key ("workflowId")=(8b213cac-...) already exists.
\`\`\`
across several different workspaces that share the same workflowId
(seeded/cloned data): workspace A's active version claims the
workflowId, and every other workspace's insert collides. Every other
index on this table includes \`workspaceId\`; this one dropped it when
copied from the per-tenant workspace entity.
## Fix
Index becomes \`(workspaceId, workflowId) WHERE status='ACTIVE'\` — one
active version per workflow **per workspace**, matching the table's
multi-tenant design and the intended invariant. New 2-20 fast instance
command drops and recreates the index (Phase 0's command is
merged/append-only).
## Test
Reset + reproduce the exact scenario against the fixed index:
- two workspaces with the same workflowId, both ACTIVE → **insert
succeeds** (previously collided)
- a second ACTIVE version for the same workflow within one workspace →
**still blocked** (invariant preserved)
Zero \`migrate:generate\` drift, typecheck + lint clean. After this
deploys, re-run \`upgrade:2-20:backfill-workflow-version-to-core\`.
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The #1 Open-Source CRM
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Why Twenty
Twenty gives technical teams the building blocks for a custom CRM that meets complex business needs and quickly adapts as the business evolves. Twenty is the CRM you build, ship, and version like the rest of your stack.
Learn more about why we built Twenty
Installation
Cloud
The fastest way to get started. Sign up at twenty.com and spin up a workspace in under a minute, with no infrastructure to manage and always up to date.
Build an app
Scaffold a new app with the Twenty CLI:
npx create-twenty-app my-app
Define objects, fields, and views as code:
import { defineObject, FieldType } from 'twenty-sdk/define';
export default defineObject({
nameSingular: 'deal',
namePlural: 'deals',
labelSingular: 'Deal',
labelPlural: 'Deals',
fields: [
{ name: 'name', label: 'Name', type: FieldType.TEXT },
{ name: 'amount', label: 'Amount', type: FieldType.CURRENCY },
{ name: 'closeDate', label: 'Close Date', type: FieldType.DATE_TIME },
],
});
Then ship it to your workspace:
npx twenty app:publish --private
See the app development guide for objects, views, agents, and logic functions.
Self-hosting
Run Twenty on your own infrastructure with Docker Compose, or contribute locally via the local setup guide.
Everything you need
Twenty gives you the building blocks of a modern CRM (objects, views, workflows, and agents) and lets you extend them as code. Here's a tour of what's in the box.
Want to go deeper? Read the User Guide for product walkthroughs, or the
Documentation for developer reference.
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Stack
TypeScript
Nx
NestJS, with BullMQ,
PostgreSQL,
Redis
React, with Jotai, Linaria and Lingui
Thanks
Thanks to these amazing services that we use and recommend for code review (Greptile), catching bugs (Sentry) and translating (Crowdin).
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