Création d'équipes Teams

Bonsoir,

Je rencontre des difficultés pour la création des équipes Teams. 
Lorsque je clique sur le bouton "Office 365" puis groupe, équipe Teams, créer modifier, j'obtiens le message ci-dessous.

"09/2023 22:56:59] {Création/Modification} Equipe Teams : "6 eme 1" Description : "Classe de 6 eme 1"
[OFFICE365] [01/09/2023 22:56:59] {Création/Modification} Script="C:\Program Files\KoXo Dev\KoXoAdm\AdminScripts\SecondaryGroupCreateModifyTeamsO365.ps1"
[POWERSHELL] [09/01/2023 22:57:02]: [OK] Powershell module "MicrosoftTeams" V5.5.0 loaded
[POWERSHELL] [09/01/2023 22:57:03]: [OK] Powershell module "MSOnline" V1.1.183.66 loaded
[POWERSHELL] [09/01/2023 22:57:03]: [OK] Powershell module "ExchangeOnlineManagement" V3.2.0 loaded
[POWERSHELL] [09/01/2023 22:57:04]: [OK] Connection was successful to Microsoft Online Services
[POWERSHELL] [09/01/2023 22:57:13]: [OK] Connection was successful to Microsoft Exchange Online Management
[POWERSHELL] [09/01/2023 22:57:15]: [OK] Connection was successful to Microsoft Teams
[POWERSHELL] [09/01/2023 22:57:16]: [ERROR] Creating team "6 eme 1" (MailNickName=teams-6eme1)
[POWERSHELL] ErrorsCount[6 eme 1]=1
[POWERSHELL] TotalErrorsCount=1
[POWERSHELL] TotalWarningsCount=0"

Que dois-je faire ?

Cordialement