Team name conflict despite user deleted

I created long time ago a user for my company to avoid name squatting.
Since there is a team feature now, I deleted the user but still can’t create a team with this name.
At team creation, error says there is already a user with this name, even if it’s not the case

No files or tests are identified in the issue. Start by reproducing team creation after deleting a same-named user, then trace the name-conflict error through the team and user lookup paths; done means the deleted name can be used for a new team without incorrectly reporting an existing user.

Written by the indexing model from the issue text.