---
title: "Breaking: #84744 - Raise doctrine/dbal-version"
manual: "TYPO3 Core Changelog"
version: "main"
permalink: "https://docs.typo3.org/permalink/changelog:breaking-84744"
source: "Changelog/9.3/Breaking-84744-RaiseDoctrinedbal-version.rst"
modified: "2026-09-15T10:46:36+00:00"
---

# Breaking: #84744 - Raise doctrine/dbal-version

See [forge#84744](https://forge.typo3.org/issues/84744)

## Description

The upgrade doctrine/dbal to 2.7.1 came with a potentially breaking change that makes
it necessary to adjust the format of DateInterval fields.

Those fields can now be negative as well and thus are expected to begin with either
`+` or `-`.

## Impact

Users not having prefixes in DateInterval fields will be greeted by a `ConversionException`.

We do not expect many (if any) TYPO3 users to be affected by this change.

You can read up on the topic at [https://github.com/doctrine/dbal/pull/2579](https://github.com/doctrine/dbal/pull/2579) and [https://github.com/doctrine/dbal/releases/tag/v2.7.0](https://github.com/doctrine/dbal/releases/tag/v2.7.0).

## Affected Installations

Users with existing DateInterval fields that don't yet use the proper field prefix.

## Migration

Manually provide the proper prefixes in your DateInterval fields.

If you didn't use negative DateIntervals yet, you can safely prefix your data with `+`.