I have converted a large part of the data, but only 5% of the data was successfully converted. The failed devicetoken shows "bad devicetoken" when accessing APNS. Here are examples of failed conversions devicetoken. Is there any official documentation for this part? DeviceToken Orgin \xc2\xa1\xcb\x9cr\xc3\x81\xe2\x80\x9e\x01b\xc3\xbce1pf\t\xc2\xa7\xc3\x82v}\xc3\xa1\xc3\x9a:?\r\n\xc3\xa5\xc6\x92\xc3\xb7y\xc3\x9e\xe2\x80\x9c\xc3\x89r

everytime i get my devicetoken from mdm certification,send to apns (api.push.apple.com 443),always return 400,please help me confirm if the devicetoken is expired or somethine wrong else here is the request and response device_token:79c3aec2b2c2b672c3b756c3910977c3a936c3aae280985ac380e280a6091cc2bfc3a132192b14c392c2be7a2ee280a229c3aa push_magic:AAFDAB81-0E63-4B72-A60A-1F8085325870 status_code: 400 headers: {'apns-id': '14BDD477-7D76-A2FB-582C-140BBD95A420'} resp: {'reason': 'BadDeviceToken'}