I loaded it in .14.23, saved it, and tried to open it in .16.51, and I got this error log:

0.001 2019-03-30 08:47:03; Factorio 0.16.51 (build 36654, win64, steam)
0.001 Operating system: Windows 7 Service Pack 1
0.003 Program arguments: "F:\SteamLibrary\steamapps\common\Factorio\bin\x64\Factorio ...

I recently loaded up one of my old worlds from .14, and it crashes upon opening with the following log:

0.001 2019-03-29 10:52:10; Factorio 0.16.51 (build 36654, win64, steam)
0.002 Operating system: Windows 7 Service Pack 1
0.002 Program arguments: "F:\SteamLibrary\steamapps\common\Factorio\bin ...