`cluster` strategy not supported in the rate limiting advanced plugin for k4k8s DB-less or Kong in hybrid mode

I have set a KongPlugin with below yaml configuration

apiVersion: configuration.konghq.com/v1
kind: KongPlugin
metadata:
name: default-ratelimit
config:
limit:
- 1
window_size:
- 60
identifier: ip
sync_rate: 10
strategy: cluster
plugin: rate-limiting-advanced

but when i try to create/apply this KongPlugin, it is rejected. Could you tell me why?

Error from server: error when creating "kongplugin.yaml": admission webhook "validations.kong.konghq.com" denied the request: KongPlugin.configuration.konghq.com "default-ratelimit" is invalid: could not validate plugin schema: schema violation ([rate-limiting-advanced] strategy 'cluster' is not supported with Hybrid deployments or DB-less mode. If you did not specify the strategy, please use 'redis' strategy, 'local' strategy or set 'sync_rate' to -1.)

The reason this configuration is rejected is because the cluster strategy is not supported in the rate limiting advanced plugin for k4k8s DB-less or Kong deployed in hybrid mode. cluster remains a valid value for the plugin’s strategy field itself (it is not removed from the schema’s list of allowed values) — the rejection instead comes from a dedicated entity-level check that specifically blocks strategy: cluster together with a sync_rate other than -1 whenever the node’s role isn’t traditional or its database is off, producing the schema-violation message shown above. On a current Kong Gateway version, setting strategy: cluster in this scenario is rejected outright at plugin-creation time with this schema-violation error, rather than being accepted and failing at runtime. For DB-less, we recommend configuring the redis strategy to store the rate limiting counters, which enables synching of rate limiting counters between kong nodes.