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docs: require postgresql version 15 (#11806)

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Co-authored-by: April I. Murphy <36110273+aimurphy@users.noreply.github.com>

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Co-authored-by: April I. Murphy <36110273+aimurphy@users.noreply.github.com>
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Mendon Kissling
2026-02-18 16:48:51 -05:00
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docs/docs/Develop/configuration-custom-database.mdx
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@ -13,7 +13,7 @@ Langflow can more efficiently handle multiple users and larger workloads by usin
## Prerequisites
- A [PostgreSQL](https://www.pgadmin.org/download/) database
- A [PostgreSQL](https://www.pgadmin.org/download/) database version 15 or later
## Connect Langflow to a local PostgreSQL database

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docs/docs/Develop/enterprise-database-guide.mdx
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@ -23,7 +23,7 @@ For more information, see [Configure an external PostgreSQL database](/configura
1. Set up PostgreSQL:
1. Deploy a PostgreSQL instance (version 12 or higher recommended) using a local server, Docker, or a managed cloud service.
1. Deploy a PostgreSQL instance (version 15 or later) using a local server, Docker, or a managed cloud service.
2. Create a database for Langflow.
3. Create a PostgreSQL user with appropriate, minimal permissions to manage and write to the database, such as CREATE, SELECT, INSERT, UPDATE, DELETE on your Langflow tables.

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docs/docs/Support/troubleshooting.mdx
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@ -169,6 +169,21 @@ This error occurs because `asyncpg` has stricter timezone handling than `psycopg
To resolve this issue, remove `asyncpg` from your installation and use `psycopg2` instead.
### PostgreSQL version mismatch: `UNIQUE NULLS DISTINCT` syntax error
The following error can occur when initializing Langflow with a PostgreSQL database:
```text
(psycopg.errors.SyntaxError) syntax error at or near "NULLS"
LINE 13: CONSTRAINT file_name_user_id_key UNIQUE NULLS DISTINCT (nam...
```
This occurs when you're using a PostgreSQL version prior to version 15.
These versions don't support the `UNIQUE NULLS DISTINCT` syntax used by Langflow's database schema.
Langflow requires PostgreSQL 15 or higher when configured to use PostgreSQL.
To resolve this issue, upgrade your PostgreSQL instance to version 15 or higher, and then restart Langflow.
### An API key must be passed as query or header
The following error can occur when attempting to sign up on the Langflow sign in page: `An API key must be passed as query or header`.