CDO

Dear CDO experts,

I am trying to merge forecast files. However, I encounter the following warning message:
Warning (splitTimevalue) : Reset wrong date/time to 0000-04-01 18:00:18!

The netcdf file can be downloaded from this link:

https://www.dropbox.com/s/xiyyt6vbw5ryt96/jra55_surface_fluxes_200812_daymean.nc?dl=0

Here's the output of cdo sinfo command:

Warning (splitTimevalue) : Reset wrong date/time to 0000-04-01 18:00:18!
File format : NetCDF
-1 : Institut Source T Steptype Levels Num Points Num Dtype : Parameter ID
1 : unknown unknown v instant 1 1 41760 1 F32 : -1
2 : unknown unknown v instant 1 1 41760 1 F32 : -2
3 : unknown unknown v instant 1 1 41760 1 F32 : -3
4 : unknown unknown v instant 1 1 41760 1 F32 : -4
5 : unknown unknown v instant 1 1 41760 1 F32 : -5
6 : unknown unknown v instant 1 1 41760 1 F32 : -6
7 : unknown unknown v instant 1 1 41760 1 F32 : -7
8 : unknown unknown v instant 1 1 41760 1 F32 : -8
9 : unknown unknown v instant 1 1 41760 1 F32 : -9
10 : unknown unknown v instant 1 1 41760 1 F32 : -10
11 : unknown unknown v instant 1 1 41760 1 F32 : -11
12 : unknown unknown v instant 1 1 41760 1 F32 : -12
13 : unknown unknown v instant 1 1 41760 1 F32 : -13
14 : unknown unknown v instant 1 1 41760 1 F32 : -14
15 : unknown unknown v instant 1 1 41760 1 F32 : -15
16 : unknown unknown v instant 1 1 41760 1 F32 : -16
17 : unknown unknown v instant 1 1 41760 1 F32 : -17
18 : unknown unknown v instant 1 1 41760 1 F32 : -18
19 : unknown unknown v instant 1 1 41760 1 F32 : -19
20 : unknown unknown v instant 1 1 41760 1 F32 : -20
21 : unknown unknown v instant 1 1 41760 1 F32 : -21
22 : unknown unknown v instant 1 1 41760 1 F32 : -22
23 : unknown unknown v instant 1 1 41760 1 F32 : -23
24 : unknown unknown v instant 1 1 41760 1 F32 : -24
25 : unknown unknown v instant 1 1 41760 1 F32 : -25
26 : unknown unknown v instant 1 1 41760 1 F32 : -26
Grid coordinates :
1 : lonlat : points=41760 (288x145)
lon : 0 to 358.75 by 1.25 degrees_east circular
lat : 90 to -90 by -1.25 degrees_north
Vertical coordinates :
1 : surface : levels=1
Time coordinate : 1 step
YYYY-MM-DD hh:mm:ss YYYY-MM-DD hh:mm:ss YYYY-MM-DD hh:mm:ss YYYY-MM-DD hh:mm:ss
0000-04-01 18:00:18
cdo sinfo: Processed 26 variables over 1 timestep ( 0.01s 6400KB )

Any idea on how to solve this issue?

I'll appreciate any help.

Lyndz