# How to disable experimental features on already running cluster
**URL:** https://forum.scylladb.com/t/how-to-disable-experimental-features-on-already-running-cluster/986
**Category:** ScyllaDB
**Created:** [November 8, 2023, 12:06pm UTC](https://forum.scylladb.com/t/how-to-disable-experimental-features-on-already-running-cluster/986 "2023-11-08T12:06:00Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Farhad](https://forum.scylladb.com/u/Farhad)
#### Post date: [November 8, 2023, 12:06pm UTC](https://forum.scylladb.com/t/how-to-disable-experimental-features-on-already-running-cluster/986/1 "2023-11-08T12:06:00Z")
I have a 5.2.9 cluster running. Currently in the scylla config I have the following experimental features enabled:
```auto
experimental_features:
- alternator-ttl
- alternator-streams
```
How can I disable these features on my cluster? I have tried removing them from scylla.yml and restart the service but the node will not join the cluster anymore with following error:
`(Feature 'ALTERNATOR_STREAMS' was previously enabled in the cluster but its support is disabled by this node. Set the corresponding configuration option to enable the support for the feature.)`
---
### Author:  [@felipemendes](https://forum.scylladb.com/u/felipemendes)
#### Post date: [November 8, 2023, 1:04pm UTC](https://forum.scylladb.com/t/how-to-disable-experimental-features-on-already-running-cluster/986/2 "2023-11-08T13:04:16Z")
Enabling Alternator Streams means that the feature flag bit is set in gossip, so you can’t disable it any longer.
But this shouldn’t be a problem, as you simply can avoid using it by not having any Alternator tables with Streams enabled. Just keep the ball rolling, or re-create the cluster with the feature disabled.
Unrelated, yet worth to mention anyway: Alternator TTL is production ready on 5.2, so you no longer have to enable it manually on scylla.yaml