Issue with New-DFSNFolderTarget cmdlet - powershell

Question

I'm trying to automate repointing DFS folders. This is my current script:
$ft=get-dfsnfolder "\\test.dfs.domain\testpath\zzTop\*" | get-dfsnfoldertarget
$ft|% {
if ($_.targetpath -like "*blah*") {
new-dfsnfoldertarget -Path $_.path -State online -TargetPath ($_.targetpath).replace("\\blah.test.domain\testpath\zzTop","\\new.test.domain\testpath\zzTop")
}
}
I'm receiving a very weird error that is completely non-specific and makes this basically impossible to debug below:
new-dfsnfoldertarget : Can't add DFS namespace folder target "\\blah.test.domain\testpath\zzTop\2two"
At C:\Users\my_username\Desktop\ChangeDFSTargetTEST.ps1:2 char:46
+ ... *blah*") {new-dfsnfoldertarget -Path $_.path -State online -TargetP ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (MSFT_DfsNamespaceFolderTarget:ROOT\Microsoft\...aceFolderTarget) [New-DfsnFolderTarget], CimException
+ FullyQualifiedErrorId : Windows System Error 80,New-DfsnFolderTarget
new-dfsnfoldertarget : A general error occurred that is not covered by a more specific error code.
At C:\Users\my_username\Desktop\ChangeDFSTargetTEST.ps1:2 char:46
+ ... *blah*") {new-dfsnfoldertarget -Path $_.path -State online -TargetP ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (MSFT_DfsNamespaceFolderTarget:ROOT\Microsoft\...aceFolderTarget) [New-DfsnFolderTarget], CimException
+ FullyQualifiedErrorId : MI RESULT 80,New-DfsnFolderTarget
I'm running this script as admin on the box that is hosting and managing the DFS, so no issues with remote connections. I also have a script to offline these paths which works fine and also uses the "$_.targetpath -like "blah".
Also, if I run the command:
new-dfsnfoldertarget -Path $_.path -State online -TargetPath ($_.targetpath).replace("\\blah.test.domain\testpath\zzTop","\\new.test.domain\testpath\zzTop")
Replacing the variables with the strings that are fed into it automatically (so running it manually), it works fine. This is from a Server 2019 Standard box with PSVersion 5.1.17763.1490.
Any insight would be appreciated.

Answer 1

This won't be terribly relevant, but I realized I had set up DFS using an admin share path which is locked down almost completely so the testing I was doing was useless.
This script works fine if your DFS is healthy.