At which stage of enlightenment are the aggregates seen as not-self fully?

In the Khemaka Sutta (https://suttacentral.net/sn22.89/en/sujato) Khemaka is an Anagami and he sees the aggregates as not-self. Based on this I guess the answer to my question is probably stream-entry or anagami, but I'm not sure. This is a quote from that sutta: > “In the same way, reverends, I don’t say ‘I am’ with reference to > form, or apart from form. I don’t say ‘I am’ with reference to feeling > … perception … choices … consciousness, or apart from consciousness. > For when it comes to the five grasping aggregates I’m not rid of the > conceit ‘I am’. But I don’t regard anything as ‘I am this’. > > Although a noble disciple has given up the five lower fetters, they > still have a lingering residue of the conceit ‘I am’, the desire ‘I > am’, and the underlying tendency ‘I am’ which has not been eradicated.