<Retrofit error time format hh:mm[:ss[.uuuuuu]]> I...

# stackoverflow

[user]

Retrofit error time format hh:mm[:ss[.uuuuuu]]
I have code for post request using retrofit2 @PartMap, but why is this value format always error to post? What is wrong?
val open_time = HashMap()
open_time["open_time[0]day"] =1
open_time["open_time[0]open_at"]= "130000.000001"
open_time["open_time[0]close_at"]= "140000.000001"

in the ApiService
@PartMap
open_time : HashMap

error log :

D/OkHttp: {"open_time":[{"open_at":["Time has wrong format. Use one of
these formats instead: hhmm[ss[.uuuuuu]]."],"close_at":["Time has
wrong...