网络中无线控制器是2504，AP是1852E和2702E/I，现在log中报错显示如下，查询AP 00:29:c2:2a:af:60发现是1852的，而且是所有1852都有提示，其他AP没有，WLC版本8.5.161，想知道这是什么原因导致的
*spamApTask2: May 18 14:44:47.367: %CAPWAP-3-DISC_AP_MGR_ERR1: capwap_ac_sm.c:2133 The system is unable to process Primary discovery request from AP 00:29:c2:2a:af:60 on interface (1), VLAN (35), could not get IPv6 AP manager
