[Bug]: Reindex fails if alias exists

[ascheider]

If previous index failed and was interrupted, you can not reindex again, because alias exists: bin/console generic-data-index:deployment:reindex

The exception is thrown:

Failed to update Aliases: {"error":{"root_cause":[{"type":"invalid_alias_name_exception","reason":"Invalid alias name [studio_demo_pimcoredata-object_uebung1], an index exists with the same name as the alias","index":"studio_demo_pimcoredata-object_uebung1","index_uuid":"Cv-f0BF4TjiHuyl-LVeb6g"}],"type":"invalid_alias_name_exception","reason":"Invalid alias name [studio_demo_pimcoredata-object_uebung1], an index exists with the same name as the alias","index":"studio_demo_pimcoredata-object_uebung1","index_uuid":"Cv-f0BF4TjiHuyl-LVeb6g"},"status":400}

You have then to delete index manually with curl for example, so the reindex is possible again: curl -X DELETE "http://127.0.0.1:9200/studio_demo_pimcoredata-object_uebung1"

Maybe patch the method like this https://github.com/pimcore/generic-data-index-bundle/blob/2026.x/src/Service/SearchIndex/IndexService/IndexHandler/AbstractIndexHandler.php#L142

Then no error appear anymore and you do not need to delete manually