[Bug] first call to scoop update after install throws warning

[josephnarai]

Bug Report

Current Behavior

First call to scoop update after installing scoop throws the following

scoop update

Add-Member : Cannot add a member with the name "last_update" because a member with that name already exists. To overwrite the member anyway, add the Force parameter to your command.
At C:\scoop\apps\scoop\current\lib\core.ps1:1241 char:28
+ ... oopConfig | Add-Member -MemberType NoteProperty -Name $_.Value -Value ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (@{last_update=2..._branch=master}:PSObject) [Add-Member], InvalidOperationException
    + FullyQualifiedErrorId : MemberAlreadyExists,Microsoft.PowerShell.Commands.AddMemberCommand

Subsequent calls do not throw the exception.

Expected Behavior

Updating Scoop...
Updating 'main' bucket...
Scoop was updated successfully!

Additional context/output

Possible Solution

System details

Windows version: [e.g. 7, 8, 10, 11]
Windows 10 and 11

OS architecture: [e.g. 32bit, 64bit, arm64]
64 bit

PowerShell version: [output of "$($PSVersionTable.PSVersion)"]
Major Minor Build Revision

---

5 1 22621 608

Additional software: [(optional) e.g. ConEmu, Git]

Scoop Configuration

{
"last_update": "2022-10-17T11:38:10.3950776+11:00",
"scoop_branch": "master",
"scoop_repo": "https://github.com/ScoopInstaller/Scoop"
}

//# Your configuration here