# Error 1715: INSERT... SELECT... ON DUPLICATE KEY UPDATE is unsafe because the order in which rows ar

| Error Code | SQLSTATE | Error                                      | Description                                                                                                                                                                                                                          |
| ---------- | -------- | ------------------------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| 1715       | HY000    | ER\_BINLOG\_UNSAFE\_INSERT\_SELECT\_UPDATE | INSERT... SELECT... ON DUPLICATE KEY UPDATE is unsafe because the order in which rows are retrieved by the SELECT determines which (if any) rows are updated. This order cannot be predicted and may differ on master and the slave. |

## Possible Causes and Solutions

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