# PostHog product-4401b29b0a — Release & Upgrade Intelligence
- **Product:** PostHog (https://posthog.com)
- **Version:** product-4401b29b0a
- **Released:** Nov 05, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/posthog/updates/product-4401b29b0a/

## Executive Summary (TL;DR)
PostHog has improved endpoint materialization to handle unsupported variable expressions gracefully without suspending queries. Systems will now automatically revert to running endpoints directly when rebuilds fail due to incompatible variables.

## Improvements
- Added clear error messaging for unsupported variable expressions in materialization
- Automatic fallback to direct query execution when materialization rebuilds are incompatible
- Retention of last known working query during rebuild failures

## Bug Fixes
- Prevented accumulation of retries and suspension for endpoints with unsupported variable expressions