Response: {"ok":false,"error_code":400,"description":"Bad Request: group chat was upgraded to a supergroup chat","parameters":{"migrate_to_chat_id":-1002821962247}}Array
(
    [0] => Mail delivery failed: returning message to sender
    [1] => Mail delivery failed: returning message to sender
    [2] => Mail delivery failed: returning message to sender
    [3] => Mail delivery failed: returning message to sender
    [4] => Mail delivery failed: returning message to sender
    [5] => Mail delivery failed: returning message to sender
    [6] => Mail delivery failed: returning message to sender
    [7] => Mail delivery failed: returning message to sender
    [8] => Mail delivery failed: returning message to sender
    [9] => Mail delivery failed: returning message to sender
    [10] => Mail delivery failed: returning message to sender
    [11] => Mail delivery failed: returning message to sender
    [12] => Mail delivery failed: returning message to sender
    [13] => Mail delivery failed: returning message to sender
    [14] => Mail delivery failed: returning message to sender
    [15] => Mail delivery failed: returning message to sender
    [16] => Mail delivery failed: returning message to sender
    [17] => Mail delivery failed: returning message to sender
    [18] => Mail delivery failed: returning message to sender
    [19] => Mail delivery failed: returning message to sender
    [20] => Mail delivery failed: returning message to sender
    [21] => Mail delivery failed: returning message to sender
    [22] => Mail delivery failed: returning message to sender
    [23] => Mail delivery failed: returning message to sender
    [24] => Mail delivery failed: returning message to sender
    [25] => Mail delivery failed: returning message to sender
    [26] => Mail delivery failed: returning message to sender
    [27] => Mail delivery failed: returning message to sender
    [28] => Mail delivery failed: returning message to sender
    [29] => Mail delivery failed: returning message to sender
    [30] => Mail delivery failed: returning message to sender
    [31] => Mail delivery failed: returning message to sender
    [32] => Mail delivery failed: returning message to sender
    [33] => Mail delivery failed: returning message to sender
    [34] => Mail delivery failed: returning message to sender
    [35] => Mail delivery failed: returning message to sender
    [36] => Mail delivery failed: returning message to sender
    [37] => Mail delivery failed: returning message to sender
    [38] => Mail delivery failed: returning message to sender
    [39] => Mail delivery failed: returning message to sender
    [40] => Mail delivery failed: returning message to sender
    [41] => Mail delivery failed: returning message to sender
    [42] => Mail delivery failed: returning message to sender
    [43] => Mail delivery failed: returning message to sender
    [44] => Mail delivery failed: returning message to sender
    [45] => Mail delivery failed: returning message to sender
    [46] => Mail delivery failed: returning message to sender
    [47] => Mail delivery failed: returning message to sender
    [48] => Mail delivery failed: returning message to sender
    [49] => Mail delivery failed: returning message to sender
    [50] => Mail delivery failed: returning message to sender
    [51] => Mail delivery failed: returning message to sender
    [52] => Mail delivery failed: returning message to sender
    [53] => Mail delivery failed: returning message to sender
    [54] => Mail delivery failed: returning message to sender
    [55] => Mail delivery failed: returning message to sender
)