Fixing "Error attempting Upgrade Database Schema" When Upgrading vCenter 8.0 U3x to 9.1.0.0

If you’re moving vCenter Server from 8.0 U3x to 9.1.0.0 — typically as part of a VCF 9.1 deployment or a VVF 9.1 upgrade — the run can fail partway through with: Error attempting Upgrade Database Schema Please check vcintegrity migration logs for details. This is one of those failures that looks scary in the UI but has a clean, well-understood root cause: a handful of orphaned rows in the vcIntegrity database that trip a new foreign-key constraint introduced in 9.1. Below is the whole story — what the error means, how to read the logs, why it happens, and how to clear it so the upgrade completes. It’s the same shape of problem I wrote about in fixing PostgreSQL on Fleet Management 9.0.1: a schema change colliding with pre-existing data. ...

June 16, 2026 · Cosmin Trif

Fix: Unable to Update BOM Components — "Compatibility File Is Missing" in SDDC Manager

If you have upgraded your VMware Cloud Foundation (VCF) environment to version 5.x from an earlier release, you may find yourself unable to update BOM (Bill of Materials) components from the SDDC Manager UI. The “Update Now” or “Configure Update” button is greyed out and you see a frustrating error: “Update cannot be started now as compatibility file is missing” This post walks through the symptoms, root cause, and the step-by-step fix based on Broadcom KB 396202. ...

June 5, 2026 · Cosmin Trif