In Padma Purana Rama wails that he has intentionally killed a brahmana(ravana)..Sesa deva says You have just killed a wicked person and done his uddhar.but rama says that there is no prayaschitta for intentional sin..Then asks for atonement from Agastya who tells Rama to perform Ashwamedha..
https://www.wisdomlib.org/hinduism/book/the-padma-purana/d/doc365319.html
Is it true that intentional sins have no expitiation? Or it is just Rama wailing as a lila?