1091 🐬 MySQL

MySQL ERROR 1091 (42000): Can't DROP 'x'; check that column/key exists

ALTER TABLE tried to drop a column or index that doesn’t exist.

Seen on: MySQL

Meaning

Migrations running twice or written against a different schema version.

Common causes

  • Already dropped
  • Different name in this environment

⚡ Quick fix

  1. Check SHOW CREATE TABLE
  2. Make migrations idempotent

Detailed fix by platform

MySQL

  1. SHOW CREATE TABLE orders\G

How to diagnose

  1. Object — Exists under that name?
  2. Recent change — Did it start after a deploy, upgrade, or configuration change? Compare with the last working version.

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