New-MgSiteListItem won't allow number in Body Parameter.

[belchershane]

Describe the bug

When trying to create a new list item using the new-mgsitelistitem method, I get an error status: 500 (Internal Server Error) if any of my fields within the body parameter are a number. This applies whether the number is a string or not. If I add an alpha or symbol character, it works fine.

Expected behavior

I expected to have a new item in my list with my employee number field to be stored in the Employee Number column.

How to reproduce

Here is the script I use to connect to Graph and submit a new item to my Sharepoint list.

$siteId = (get-MgSite -Search 'Automated Processes').Id

#$List = Get-MgSiteList -SiteId $siteId -Filter 'displayName eq 'Daily Account Updates''
$list = Get-MgSiteList -ListId '' -SiteId $siteId #removed for confidentiality.

$NewItemParameters = @{
fields = @{
Title = 'Disabled Account'
FirstName = 'First Last Name'
LastName = 'Test Last Name'
Location = 'Old Location'
NewLocation = 'New Location'
Position = 'Net Admin2'
NewPosition = 'Master of All'
EmpIdentifier = '12345'

}
}

#$Fields = Get-MgSiteList -SiteId $siteId -ListId $List.Id -ExpandProperty Columns | Select-Object -ExpandProperty Columns | Select-Object DisplayName, Name

$NewItem = New-MgSiteListItem -SiteId $siteId -ListId $List.Id -BodyParameter $NewItemParameters

SDK Version

2.26.1

Latest version known to work for scenario above?

No response

Known Workarounds

Make the Employee Number field a alpha field by adding a symbol or a letter to the input.

Debug output

Click to expand log

```

Welcome to Microsoft Graph!

Connected via userprovidedaccesstoken access using
Readme: https://aka.ms/graph/sdk/powershell
SDK Docs: https://aka.ms/graph/sdk/powershell/docs
API Docs: https://aka.ms/graph/docs

NOTE: You can use the -NoWelcome parameter to suppress this message.

DEBUG: [CmdletBeginProcessing]: - New-MgSiteListItem begin processing with parameterSet 'Create'.
DEBUG: [Authentication]: - AuthType: 'UserProvidedAccessToken', TokenCredentialType: 'UserProvidedAccessToken', ContextScope: 'Process', AppName: ''.
DEBUG: [Authentication]: - Scopes: [Sites.FullControl.All].

Confirm
Are you sure you want to perform this action?
Performing the operation "New-MgSiteListItem_Create" on target "Call remote 'POST /sites/{site-id}/lists/{list-id}/items' operation".
[Y] Yes [A] Yes to All [N] No [L] No to All [S] Suspend [?] Help (default is "Y"): y
DEBUG: ============================ HTTP REQUEST ============================

HTTP Method:
POST

Absolute Uri:

Headers:
FeatureFlag : 00000003
Cache-Control : no-store, no-cache
User-Agent : Mozilla/5.0,(Windows NT 10.0; Microsoft Windows 10.0.26100; en-US),PowerShell/2025.0.0
SdkVersion : graph-powershell/2.26.1
client-request-id : ae3ee7af-23d1-4be2-8020-9255eb681e35
Accept-Encoding : gzip,deflate,br

Body:
{
"fields": {
"EmpIdentifier": 12345,
"Title": "Disabled Account",
"NewPosition": "Master of All",
"NewLocation": "New Location",
"Position": "Net Admin2",
"LastName": "Test Last Name",
"Location": "Old Location",
"FirstName": "First Last Name"
}
}

DEBUG: ============================ HTTP RESPONSE ============================

Status Code:
InternalServerError

Headers:
Cache-Control : no-store, no-cache
Vary : Accept-Encoding
Strict-Transport-Security : max-age=31536000
request-id : bf35033f-810c-4882-9b58-9628606d4225
client-request-id : ae3ee7af-23d1-4be2-8020-9255eb681e35
x-ms-ags-diagnostic : {"ServerInfo":{"DataCenter":"East US","Slice":"E","Ring":"5","ScaleUnit":"002","RoleInstance":"BL02EPF000365D8"}}
Date : Tue, 18 Mar 2025 17:25:33 GMT

Body:
{
"error": {
"code": "generalException",
"message": "General exception while processing",
"innerError": {
"date": "2025-03-18T17:25:34",
"request-id": "bf35033f-810c-4882-9b58-9628606d4225",
"client-request-id": "ae3ee7af-23d1-4be2-8020-9255eb681e35"
}
}
}

New-MgSiteListItem_Create: C:\Users\belcher.shane\OneDrive - secep.net\Documents\PowerShell\SP\Sharepoint Connect-Graph.ps1:45:1
Line |
45 | $NewItem = New-MgSiteListItem -SiteId $siteId -ListId $List.Id -BodyP …
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| General exception while processing Status: 500 (InternalServerError) ErrorCode: generalException Date: 2025-03-18T17:25:34 Headers: Cache-Control : no-store, no-cache Vary
| : Accept-Encoding Strict-Transport-Security : max-age=31536000 request-id : bf35033f-810c-4882-9b58-9628606d4225 client-request-id :
| ae3ee7af-23d1-4be2-8020-9255eb681e35 x-ms-ags-diagnostic : {"ServerInfo":{"DataCenter":"East US","Slice":"E","Ring":"5","ScaleUnit":"002","RoleInstance":"BL02EPF000365D8"}} Date
| : Tue, 18 Mar 2025 17:25:33 GMT

Recommendation: See service error codes: https://learn.microsoft.com/graph/errors
DEBUG: [CmdletEndProcessing]: - New-MgSiteListItem end processing.

</details>


### Configuration

- OS: Windows 11 PRO 24H2
- 
- Name                           Value
----                           -----
PSVersion                      7.5.0
PSEdition                      Core
GitCommitId                    7.5.0
OS                             Microsoft Windows 10.0.26100
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

I've only tried it on this one machine. 

### Other information

_No response_

[timayabi2020]

Hi @belchershane apologies for the inconvenience. This is an automatic inferencing issue and was already reported here #3187 and the correction will be available in the next release. I'll therefore close this as a duplicate.

[belchershane]

Hi @timayabi2020, thank you for this information. I am fairly new to graph, how often do updates come out?