> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/server/reference/error-codes/mariadb-error-codes-4100-to-4199/e4126.md).

# Error 4126: PERIOD FOR SYSTEM\_TIME must use columns

| Error Code | SQLSTATE | Error                     | Description                                          |
| ---------- | -------- | ------------------------- | ---------------------------------------------------- |
| 4126       |          | ER\_VERS\_PERIOD\_COLUMNS | PERIOD FOR SYSTEM\_TIME must use columns %`s and %`s |

## Possible Causes and Solutions

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