hccapx Problem

[Hedotensei]

Hello every one , i capture a handshake with wifislax using handshaker 
when i go to convert it Cap to hccapx  i had this message : 

Zero value timestamps detected in file: in/28216_1498269703.cap.

This prevents correct EAPOL-Key timeout calculation.

Do not use preprocess the capture file with tools such as wpaclean.

Please help me !