"Array has duplicate keys with value" false-positives #13013
Description
Bug report
looks like a regerssion from 2.1.15.
I don't see the errors with 2.1.14
Code snippet that reproduces the problem
https://phpstan.org/r/e45fb3ad-6638-49f0-90e0-79f83d89a7ca
Expected output
no error
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