4120
MySQLERRORNotableHIGH confidence
Incorrect table definition
Production Risk
Low — DDL fails; no data is affected.
Why it happens
- 1Conflicting column definitions (e.g., AUTO_INCREMENT on a non-key column).
- 2Missing required table options for the storage engine.
- 3Invalid combination of column attributes.
Fix
Review and correct the CREATE TABLE or ALTER TABLE statement
Why this works
Check the error message details for the specific definition conflict and correct it.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 4120 ER_WRONG_TABLE_DEF2
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