Hi, The coreswitch connected to Edge switches 2960 and the Edges connected to Access Points. Yes the clients roaming between access point with the same SSID, so there is any misconfiguration in Coreswitch, edge switches or access points?
If the Access Points are placing clients straight onto the local network as opposed to being tunneled back to a WLC via CAPWAP then seeing these MAC flaps should be considered normal and just cosmetic messages.
I don't know anything about Altai APs and how they are configured in your network, but the MAC flap on a wireless VLAN is a common symptom of a roaming client. As I said before it is not something to be worried about, unless the device users are complaining about service degradation occurring at the time of MAC flap.