I got the email:

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Hi Michael,

Since you are active in CFC Governor meeting can you point out that Toronto
FIDE Master Yuanchen Zhang has two FIDE ID numbers:
#2611902
#2618915

The first number has his title and rating, should be kept.
The Hart House Christmas Open is showing on FIDE site with his wrong
ID number, presumably should be fixed to his real ID number as it now
shows him as unrated and impacts other players who played him.
(see attached image)

If these issues are not fixed, the errors will multiply exponentially and eventually
years later CFC administration spends all the time fixing mistakes instead of providing
originally intended service. By that time the person who caused the problems no longer
works there and somebody else takes the blame.

If you post please keep my name out of it, just say a player pointed it out to you.
Personally I would also ask who is supposed to audit for these errors as there may be
more of them. Where there is one error, there are how many more we simply do not know.
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Could we fix it?