Bitbucket Deployment Environment Locked (deployment in progress)

Bitbucket serializes deployments per environment. A deploy is locked out while another deployment to the same environment is in progress - a concurrency guard, not a failure, that clears once the running deploy finishes.

What this error means

A deployment step waits or is blocked noting the environment is locked because a deployment is in progress. It proceeds once the in-flight deploy completes, or you can cancel/queue it.

bitbucket-pipelines

Deployment to "staging" is locked: another deployment to this
environment is currently in progress.

Common causes

Concurrent deploy to the same environment

Two pipelines tried to deploy to the same environment at once. Bitbucket locks the environment so deployments do not overlap.

A previous deploy still running or stuck

An in-flight (or hung) deployment keeps the lock until it finishes or is stopped, blocking the next one.

How to fix it

Let the in-flight deploy finish, then retry

Wait for the current deployment to complete; the lock releases automatically.
If a deploy is stuck, stop it from the Pipelines UI to free the environment.
Re-run the blocked deployment once the lock clears.

Serialize deploys deliberately

Avoid launching concurrent deploys to the same environment.

How to prevent it

Avoid triggering concurrent deploys to the same environment.
Watch for stuck deployments holding the lock.
Use deployment ordering so deploys queue instead of collide.