The `v2.5.x` series of the ORM allowed to have DELETE DQLs without using
an alias, even though it didn't follow the grammar rules of the parser.
We fixed that issue on `v2.6.0` however that was a BC-breaking change
and lots of people were relying on this faulty behaviour.
This workaround fixes the BC-break, without even trying to be elegant.
In `v2.7.0.` we should raise a deprecation notice to notify people that
we'll drop that "feature" in `v3.0`.
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