Cannot handle connection ready

I found a problem in "FedML/Python/app/fedcv/object_detection/runs/train/exp/log_0.txt"

client_indexes = [0, 1]
running
receive_message. msg_type = 0, sender_id = 0, receiver_id = 0
Cannot handle connection ready
receive_message. msg_type = 3, sender_id = 1, receiver_id = 0
add_model. index = 0
b_all_received = False
receive_message. msg_type = 3, sender_id = 2, receiver_id = 0
add_model. index = 1
b_all_received = True
len of self.model_dict[idx] = 2
set_model_params
aggregate time cost: 0
round_idx: 0
Saving model at round 0
client_indexes = [0, 1]
send_message_sync_model_to_client. receive_id = 1
send_message_sync_model_to_client. receive_id = 2

The fourth line shows "Cannot handle connection ready". Why? Will it have any impact?