### Steps to reproduce

_Please write down the steps to reproduce. Try to write down all necessary preconditions (what permissions do you have, are other users involved?). Example:_

1.  Deploy OpenProject 16.0.0 Enterprise using Docker

2. Begin of the insertionConfigureEnd of the insertion Begin of the deletion  ConfigureEnd of the deletion SAML authentication via environment variables

3. Begin of the insertionStartEnd of the insertion Begin of the deletion  StartEnd of the deletion the container

4. Begin of the insertionObserveEnd of the insertion Begin of the deletion  ObserveEnd of the deletion the seeder entering an infinite loop during "Creating or Updating SAML provider saml"


### What is the buggy behavior?

1. Begin of the insertionTheEnd of the insertion Begin of the deletion  TheEnd of the deletion seeder crashes on duplicate key violation and retries indefinitely, filling disk space with repeated error logs.


### What is the expected behavior?

1. The seeder should detect the existing SAML provider and either skip creation or update the existing record gracefully.


### Important note

* Critical: Production systems at risk of disk space exhaustion

* Service unavailability when disk fills completely

* Requires manual intervention to stop the container


### **Logs**

Begin of the insertionadded in internal activitiesEnd of the insertion Begin of the deletion _(pending)_End of the deletion

### Environment information

Begin of the insertionOpenProjectEnd of the insertion Begin of the deletion  OpenProjectEnd of the deletion Version: 16.0.0 (Docker image: openproject/openproject:16.0.0-slim)

* Edition: Enterprise

* Database: PostgreSQL (version < 16 - deprecation warning present)

* Ruby Version: 3.4.0

* ActiveRecord: 8.0.2


**OpenProject installation type**

* Docker-compose installation


**OpenProject version** _16.0.0_

**Operating System**

Distributor ID: Debian
Description:    Debian GNU/Linux 12 (bookworm)
Release:    12
Codename:   bookworm
Version: 12.10