MacPorts "no suitable version found for darwin_17" even though my target is darwin 23

[Frityet]

 % omp install shared-mime-info
searching package shared-mime-info ...
no suitable version found for darwin_17
trying shared-mime instead ...
searching package shared-mime ...
no package found
trying shared instead ...
searching package shared ...
no package found
failed to install shared, try with '-v'
use 'omp fake-install <pkgname>' to fake install non-existing packages

sw_vers:

ProductName:    Mac OS X
ProductVersion: 10.13
BuildVersion:   0CFFFF