1051 MySQL Origin: Data Last updated 12 Oct 2026

MySQL ERROR 1051 (42S02): Unknown table 'x'

DROP TABLE targeted a table that doesn’t exist.

Exact message you may see Unknown table
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Seen on: MySQL

Meaning

Migrations rolled back twice or scripts dropping tables in the wrong order.

Common causes

  • Table already dropped
  • Typo or wrong database

⚡ Quick fix

  1. Use DROP TABLE IF EXISTS
  2. Check SHOW TABLES

Detailed fix by platform

MySQL

  1. DROP TABLE IF EXISTS tmp_import;

How to diagnose

  1. Table — SHOW TABLES lists it?
  2. Recent change — Did it start after a deploy, upgrade, or configuration change? Compare with the last working version.

🔧 Still not fixed?

Many errors look alike. If the steps above didn’t solve it, one of these is probably what you’re facing:

Where this error sits

Origin: Data. Errors that are often confused with or caused by this one (click to open):

1005 — MySQL ERROR 1005 (HY000): Can't create table (errno: 150 "Foreign key constraint is incorrectly formed") (MySQL)10051007 — MySQL ERROR 1007 (HY000): Can't create database 'x'; database exists (MySQL)10071008 — MySQL ERROR 1008 (HY000): Can't drop database 'x'; database doesn't exist (MySQL)10081022 — MySQL ERROR 1022 (23000): Can't write; duplicate key in table (MySQL)10221060 — MySQL ERROR 1060 (42S21): Duplicate column name 'x' (MySQL)10601061 — MySQL ERROR 1061 (42000): Duplicate key name 'x' (MySQL)10611067 — MySQL ERROR 1067 (42000): Invalid default value for 'created_at' (MySQL)10671075 — MySQL ERROR 1075 (42000): Incorrect table definition; there can be only one auto column and it must be defined as a key (MySQL)10751051

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