Key of Sorrow not spawning at NG+

[回锅照烧丸子头]

Couldn't find Key of Sorrow at NG+ (at green car by available guides), do we need to finish other endings before getting the item?

[Captain Cuddles]

same problem here. not sure what is happening

[回锅照烧丸子头]

you actually need to complete in water ending first. Never thought someone would find this post ages ago lol.