This actually applies to both the Psychic Adept and Psychic Disciple Feats. Under the prerequisites is the Psychic Sensitivity Feat. Psychic Sensitivity gives one the ability to use occult skill unlocks, which is the same benefit given simply by having the ability to cast psychic spells. In fact in a number of other feats in Occult Adventures, such as Psychic Healing, Psychic Sensitivity is only a prerequisite if one lacks the ability to cast psychic spells. My question then, is whether Psychic Sensitivity can be exchanged for the ability to cast Psychic Spells in the prerequisites for Psychic Adept and Psychic Disciple, or if a character who can already cast psychic spells has to burn a feat and receive no benefit in order to qualify for Psychic Adept and Psychic Disciple further down the line?