[GLPI 11] GenericObject plugin cannot be migrated. Please update it to the latest version

No file, test, or code entry point is identified; start by reviewing the migration instructions and the Fields plugin's compatibility with GenericObject 3.0.x. Confirm whether the intended change is documentation or implementation, and treat the work as done only when the supported GLPI 11 migration path is clearly documented or verified.

If you encounter the following message during the update of the Fields plugin (to version 1.22.0):

GenericObject plugin cannot be migrated. Please update it to the latest version.

You need to install GenericObject plugin version 3.0.x, which is an End-of-Life (EOL) version:

https://github.com/pluginsGLPI/genericobject/releases/edit/3.0.x

Generic Objects End-of-Life Updater

If you plan to migrate your GLPI instance to version 11 and have not installed version 2.14.14 (latest version) on your GLPI 10.0.x instance, a specific version compatible with GLPI 11 is available.

⚠️ Warning: the final version 3.0.x is an EOL (End of Life) release. It no longer receives functional updates or security patches.

Usage Instructions:

1. After migrating to GLPI 11, install this final version (3.0.x).
2. Run the data migration operation using the following command:
   • php bin/console migration:genericobject_plugin_to_core.
3. ⚠️ Warning: if you have added extra fields to your GenericObject items using the Fields plugin, you must update it to the version compatible with GLPI 11 (1.22.0).
   This version indeed includes a dedicated migration method to correctly associate these fields with GLPI's CustomAsset system, which they previously relied on.
4. Uninstall the GenericObject plugin once all data has been integrated and verified within the core of GLPI 11.

This version provides support for migration only. For features related to custom assets, use GLPI 11's native custom assets.