Steps to replicate the issue (include links if applicable):
The system job that reorders implementations deletes the Z2K5 value when it stores its reordering.
Here are two examples where the system edit has deleted the Z2K5 value:
https://www.wikifunctions.org/wiki/Z10000?uselang=en&diff=prev&oldid=5082
https://www.wikifunctions.org/wiki/Z10000?uselang=en&diff=prev&oldid=4898
What happens?:
It deletes Z2K5
What should have happened instead?:
It shouldn't change Z2K5
Software version (skip for WMF-hosted wikis like Wikipedia):
Other information (browser name/version, screenshots, etc.):