Ending summon greater demon

Quote from up2ng >>

This spell actually requires errata.  Currently it does not function correctly.

 Pretty sure errata is going to be "we completely replaced the spell in the 2024 book".

Quote from up2ng >>

Huh, that's really peculiar wording in the Conjure Elemental spell:

The elemental disappears when it drops to 0 hit points or when the spell ends.

 

and yet:

If your concentration is broken, the elemental doesn't disappear.

 

According to the general rules for spellcasting, Chapter 10 of the PHB, we have this:

Concentration

Some spells require you to maintain concentration in order to keep their magic active. If you lose concentration, such a spell ends.

 

This spell actually requires errata.  Currently it does not function correctly.

 Doesn't "specific beats general" make it work just fine?

Quote from Xalthu >>

 Doesn't "specific beats general" make it work just fine?

 No. The spell contradicts itself.