[5.x]: migration from 4 to 5 exception at entrify_matrix_blocks

[maknapp]

What happened?

Description

I am migrating from 4.13.8 to 5.5.8 (with postgresql).

Exception: Attempt to assign property "type" on null (/var/www/craft/vendor/craftcms/cms/src/migrations/m230617_070415_entrify_matrix_blocks.php:112)
#0 /var/www/craft/vendor/craftcms/cms/src/db/Migration.php(50): craft\migrations\m230617_070415_entrify_matrix_blocks->safeUp()
#1 /var/www/craft/vendor/yiisoft/yii2/console/controllers/BaseMigrateController.php(758): craft\db\Migration->up()
#2 /var/www/craft/vendor/craftcms/cms/src/console/controllers/MigrateController.php(382): yii\console\controllers\BaseMigrateController->migrateUp()

The $fieldLayoutUid layout uid does exist in the fieldlayouts table, if that helps.

cms/src/migrations/m230617_070415_entrify_matrix_blocks.php

Line 111 in ef947d0

$fieldLayout = $fieldLayoutUid ? $fieldsService->getLayoutByUid($fieldLayoutUid) : new FieldLayout();

Craft CMS version

5.5.8

PHP version

8.3.6

Operating system and version

Ubuntu 24.04

Database type and version

postgresql 16.6

Image driver and version

No response

Installed plugins and versions

[andykirk12]

This is also happening for me - on MariaDB

[maknapp]

The migration works for me when using craftcms 3.5.6 instead of 3.5.8. I skipped 3.5.7 and did not try it because the last change in the failed migration was made in 3.5.7.

[jpobojewski]

Confirmed this was also happening to me from Craft 4 to 5 on MySql 8.0. @mmikkel recommend on Discord the same technique as @maknapp and it resolved the issue.

[brandonkelly]

Can any of you please send a database backup from before the Craft 5 upgrade, over to support@craftcms.com?