opentelemetry-operator: TargetAllocator : error during loading configuration

Hi, i’ve got these logs at startup:

{"level":"info","ts":"2023-06-05T20:17:18Z","msg":"Starting the Target Allocator"}
{"level":"info","ts":"2023-06-05T20:17:18Z","logger":"allocator","msg":"Unrecognized filter strategy; filtering disabled"}
{"level":"info","ts":"2023-06-05T20:17:18Z","logger":"allocator","msg":"Starting server..."}
{"level":"info","ts":"2023-06-05T20:17:18Z","msg":"Waiting for caches to sync for servicemonitors\n"}
{"level":"info","ts":"2023-06-05T20:17:20Z","msg":"Caches are synced for servicemonitors\n"}
{"level":"info","ts":"2023-06-05T20:17:20Z","msg":"Waiting for caches to sync for podmonitors\n"}
{"level":"info","ts":"2023-06-05T20:17:20Z","msg":"Caches are synced for podmonitors\n"}
{"level":"info","ts":"2023-06-05T20:17:20Z","logger":"allocator","msg":"Successfully started a collector pod watcher","component":"opentelemetry-targetallocator"}
{"level":"error","ts":"2023-06-05T20:17:21Z","logger":"setup","msg":"Unable to load configuration","error":"empty duration string","stacktrace":"main.main.func13\n\t/app/main.go:198\ngithub.com/oklog/run.(*Group).Run.func1\n\t/go/pkg/mod/github.com/oklog/run@v1.1.0/group.go:38"}
{"level":"error","ts":"2023-06-05T20:17:21Z","logger":"setup","msg":"Unable to load configuration","error":"empty duration string","stacktrace":"main.main.func13\n\t/app/main.go:198\ngithub.com/oklog/run.(*Group).Run.func1\n\t/go/pkg/mod/github.com/oklog/run@v1.1.0/group.go:38"}
{"level":"error","ts":"2023-06-05T20:17:22Z","logger":"setup","msg":"Unable to load configuration","error":"empty duration string","stacktrace":"main.main.func13\n\t/app/main.go:198\ngithub.com/oklog/run.(*Group).Run.func1\n\t/go/pkg/mod/github.com/oklog/run@v1.1.0/group.go:38"}

with this configuration:

apiVersion: opentelemetry.io/v1alpha1
kind: OpenTelemetryCollector
metadata:
  labels:
    app.kubernetes.io/component: opentelemetry-collector
    app.kubernetes.io/instance: opentelemetry-collector
    app.kubernetes.io/managed-by: Helm
    app.kubernetes.io/name: opentelemetry-collector
    app.kubernetes.io/part-of: opentelemetry-collector
    app.kubernetes.io/version: 1.0.0
    argocd.argoproj.io/instance: opentelemetry-collector
    helm.sh/chart: opentelemetry-collector-1.0.0
  name: metrics
  namespace: opentelemetry
spec:
  config: |
    exporters:
      logging:
        verbosity: normal
      prometheus:
        endpoint: 0.0.0.0:9090
        metric_expiration: 180m
        resource_to_telemetry_conversion:
          enabled: true
      prometheusremotewrite/mimir:
        endpoint: http://mimir-nginx.monitoring.svc.cluster.local:80/api/v1/push
    extensions:
      basicauth/grafanacloud:
        client_auth:
          password: ${GRAFANA_CLOUD_METRICS_APIKEY}
          username: ${GRAFANA_CLOUD_METRICS_ID}
      health_check: null
      memory_ballast:
        size_in_percentage: 20
      pprof:
        endpoint: :1888
      zpages:
        endpoint: :55679
    processors:
      batch:
        send_batch_max_size: 1500
        send_batch_size: 1500
        timeout: 15s
      k8sattributes:
        extract:
          metadata:
          - k8s.namespace.name
          - k8s.pod.name
          - k8s.pod.uid
          - k8s.node.name
          - k8s.pod.start_time
          - k8s.deployment.name
          - k8s.replicaset.name
          - k8s.replicaset.uid
          - k8s.daemonset.name
          - k8s.daemonset.uid
          - k8s.job.name
          - k8s.job.uid
          - k8s.cronjob.name
          - k8s.statefulset.name
          - k8s.statefulset.uid
          - container.image.tag
          - container.image.name
        passthrough: false
        pod_association:
        - sources:
          - from: resource_attribute
            name: k8s.pod.name
      memory_limiter:
        check_interval: 5s
        limit_percentage: 90
        spike_limit_percentage: 30
      resource:
        attributes:
        - action: insert
          key: collector.name
          value: ${KUBE_POD_NAME}
    receivers:
      hostmetrics:
        collection_interval: 60s
        scrapers:
          cpu: null
          disk: null
          filesystem: null
          load: null
          memory: null
          network: null
          processes: null
      prometheus:
        config:
          global:
            evaluation_interval: 60s
            scrape_interval: 60s
            scrape_timeout: 60s
        target_allocator:
          collector_id: ${POD_NAME}
          endpoint: http://metrics-targetallocator:80
          http_sd_config:
            refresh_interval: 60s
          interval: 30s
    service:
      extensions:
      - health_check
      - memory_ballast
      - pprof
      - zpages
      pipelines:
        metrics:
          exporters:
          - logging
          - prometheus
          processors:
          - batch
          - memory_limiter
          - k8sattributes
          receivers:
          - hostmetrics
          - prometheus
      telemetry:
        logs:
          encoding: json
          level: info
        metrics:
          address: 0.0.0.0:8888
          level: detailed
  env:
  - name: K8S_NODE_NAME
    valueFrom:
      fieldRef:
        fieldPath: spec.nodeName
  - name: K8S_POD_NAME
    valueFrom:
      fieldRef:
        fieldPath: metadata.name
  - name: K8S_NAMESPACE
    valueFrom:
      fieldRef:
        fieldPath: metadata.namespace
  envFrom:
  - secretRef:
      name: opentelemetry-datadog-credentials
  - secretRef:
      name: opentelemetry-lightstep-credentials
  - secretRef:
      name: opentelemetry-grafanacloud-credentials
  image: ghcr.io/open-telemetry/opentelemetry-collector-releases/opentelemetry-collector-contrib:0.78.0
  ingress:
    route: {}
  mode: statefulset
  ports:
  - name: metrics
    port: 8888
    protocol: TCP
    targetPort: 8888
  replicas: 1
  resources:
    limits:
      memory: 3Gi
    requests:
      cpu: "1"
      memory: 2Gi
  serviceAccount: opentelemetry-collector-metrics
  targetAllocator:
    allocationStrategy: consistent-hashing
    enabled: true
    filterStrategy: relabel-config
    image: ghcr.io/open-telemetry/opentelemetry-operator/target-allocator:0.78.0
    prometheusCR:
      enabled: true
    replicas: 1
    serviceAccount: opentelemetry-collector-metrics-targetallocator
  upgradeStrategy: automatic