BQ34Z100-G1: Which of the several MJ1 chemids is the most recent?

Tool/software:

Hello.

I have a question about chemistry in bqstudio.

bqstudio chem version 1099

[Chemistry]
NumChemFiles=5067

[1158_Chem]
ChemID=2059
Description=NiCoMn/carbon, -20C
NumKnownCells=1
HF_Data=1
2OCV_Data=1
1=LGC: INR18650MJ1 (3500mAh)

[3871_Chem]
ChemID=5590
Description=LiMn2O4 (Co,Ni)/carbon, 4.2V, -25C
NumKnownCells=1
HF_Data=0
2OCV_Data=1
1=LGC: INR1865MJ1 (3500mAh)

[1251_Chem]
ChemID=2152
Description=NiCoMn/carbon, -20C
NumKnownCells=1
HF_Data=1
2OCV_Data=1
1=LGC: ICR18650MJ1 (3500mAh)

[3291_Chem]
ChemID=0508
Description=NiCoMn/carbon, 4.2V, -20C
NumKnownCells=1
HF_Data=0
2OCV_Data=1
1=LGC: INR18650MJ1 (3500mAh)

1. Which of the several MJ1 chemids is the most recent?

2. Why are there multiple chemids for one model?
I know that each chemid has slightly different information.
I think the most recently registered one is closest to the CELL I just received, but I can't figure out which chemid is most recently registered.