# There is currently a lease on the blob and no lease ID was specified in the request.

- **ID:** `cloud/azure-storage-blob-lease-expired-reason`
- **Domain:** cloud
- **Category:** protocol_error
- **Error Code:** `409 Conflict`
- **Verification:** ai_generated
- **Fix Rate:** 88%

## Root Cause

An operation (e.g., delete or overwrite) was attempted on an Azure Storage blob that has an active lease, but the request did not include the required lease ID header.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| Azure Storage REST API 2021-02-12 | active | — | — |
| Azure SDK for .NET 12.18.0 | active | — | — |
| AzCopy 10.21.0 | active | — | — |

## Workarounds

1. **Include the lease ID in the request header: x-ms-lease-id: <lease-id>. Example using Azure CLI: az storage blob delete --account-name mystorageaccount --container-name mycontainer --name myblob --lease-id "<lease-id>"** (90% success)
   ```
   Include the lease ID in the request header: x-ms-lease-id: <lease-id>. Example using Azure CLI: az storage blob delete --account-name mystorageaccount --container-name mycontainer --name myblob --lease-id "<lease-id>"
   ```
2. **If the lease ID is unknown, first break the lease without specifying a lease ID by using a break period of 0 seconds: az storage blob lease break --account-name mystorageaccount --container-name mycontainer --name myblob --lease-break-period 0** (85% success)
   ```
   If the lease ID is unknown, first break the lease without specifying a lease ID by using a break period of 0 seconds: az storage blob lease break --account-name mystorageaccount --container-name mycontainer --name myblob --lease-break-period 0
   ```
3. **For automated workflows, acquire a new lease before performing the operation: az storage blob lease acquire --lease-duration 60 --account-name mystorageaccount --container-name mycontainer --name myblob** (80% success)
   ```
   For automated workflows, acquire a new lease before performing the operation: az storage blob lease acquire --lease-duration 60 --account-name mystorageaccount --container-name mycontainer --name myblob
   ```

## Dead Ends

- **** — Breaking a lease requires knowing the lease ID or using a break period; another process may renew it. (50% fail)
- **** — The release action also requires the lease ID. (80% fail)