It is a minor issue.
The recent post Kāma Guṇa – Origin of Attachment (Tanhā) wrote: #9 At the outset of that process, a “defiled viññāna” arises as “bahidda viññāna” and strengthens to “ajjhatta viññāna” via only “kāma saṅkappa” which are“mano kamma.
So both bahidda viññāna and ajjhatta viññāna are different stages of kamma viññāna. Because those are defiled.
Upaya and Upādāna – Two Stages of Attachment
In #5 of the post, it said that “Generating “kāma saññā” happens just before kāma bhava while in the “bahidda viññāṇa” stage. An Arahant‘s mind does not go beyond the “bahidda viññāṇa” to get to the “ajjhatta viññāṇa” stage.”
Arahant cannot have any defilement, so it should be modified. I think it is just a spelling mistake of ‘bahidda kaya’.