What happens when a workspace references a deprecated module version?

When you run Terraform apply on a workspace that references a deprecated module version, the run will display a warning in the UI indicating that you're using a deprecated version and should upgrade to a newer version. The workspace will still function, but the warning provides visibility into technical debt.

How do administrators identify which workspaces are affected by a module deprecation?

Administrators can use the Explorer window to run queries that find all workspaces referencing a specific deprecated module version. These queries can be saved as views for future reference and used to create change requests that notify the appropriate teams.

Module Lifecycle Management in Terraform Cloud

Name: Module Lifecycle Management in Terraform Cloud
Uploaded: 2026-04-09T16:51:48-04:00
Duration: 3 min 12 s
Description: TL;DR Module lifecycle management in Terraform Cloud solves the problem of uncoordinated module updates that cause workspace failures and create security risks when module authors delete versions without notifying consumers. The feature provides visibi...

HashiCorp

04/09/2026

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TL;DR

Module lifecycle management in Terraform Cloud solves the problem of uncoordinated module updates that cause workspace failures and create security risks when module authors delete versions without notifying consumers.
The feature provides visibility through saved views that query which workspaces use specific module versions, communication via team notifications and change requests, and control through formal deprecation workflows.
When a module version is deprecated, workspace runs display warnings prompting upgrades, and administrators can create change requests that automatically notify affected team members with direct links to workspaces needing updates.

Summary

This demonstration introduces module lifecycle management capabilities in Terraform Cloud, addressing a critical operational challenge for organizations managing hundreds of infrastructure modules. When module authors delete or update module versions without coordinated communication, downstream workspaces can fail unexpectedly, creating security and compliance risks that require manual intervention. HashiCorp's solution provides three core capabilities: visibility through saved views that allow administrators to query and track which workspaces reference specific module versions, communication through team notifications and change requests that proactively alert module consumers to deprecations and required upgrades, and control through formal deprecation workflows that warn users when they reference outdated modules. The walkthrough demonstrates the complete workflow from deprecating a Terraform AWS VPC module, triggering warnings in workspace runs, creating saved queries to identify affected workspaces, and generating change requests that automatically notify team members via email with direct links to workspaces requiring updates. This systematic approach transforms ad-hoc module management into a governed process that reduces operational overhead while improving security posture.

Chapters

0:00 - Introduction
0:43 - Team Notifications Setup
0:59 - Module Deprecation Workflow
1:48 - Saved Views and Queries
2:18 - Change Requests

Key Quotes

0:14 "... if a module author simply deletes a module version from the private registry without proactively notifying the module consumer, their workspace would fail and require manual intervention to update module references later ..."
0:27 "This can be a security and compliance issue ..."
0:33 "... module lifecycle management that provides visibility with save views, improves communication with change requests and notifications, and gives control with deprecation ..."

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