[MM-35222] Fix DoGuestRolesCreationMigration (#17523)

* Set guest role based on scope

* Fix team scheme

* Fix scope

app/migrations.go

@@ -191,6 +191,7 @@ func (a *App) DoGuestRolesCreationMigration() {
 	}
 	for _, scheme := range schemes {
 		if scheme.DefaultTeamGuestRole == "" || scheme.DefaultChannelGuestRole == "" {
+			if scheme.Scope == model.SCHEME_SCOPE_TEAM {
 				// Team Guest Role
 				teamGuestRole := &model.Role{
 					Name:          model.NewId(),
@@ -205,6 +206,7 @@ func (a *App) DoGuestRolesCreationMigration() {
 				} else {
 					scheme.DefaultTeamGuestRole = savedRole.Name
 				}
+			}
 
 			// Channel Guest Role
 			channelGuestRole := &model.Role{