[MM-57877] Fix issue #26841 (#26956)

* Add new error message

* make i18n-extract

---------

Co-authored-by: Mattermost Build <build@mattermost.com>
Co-authored-by: Harrison Healey <harrisonmhealey@gmail.com>

server/channels/api4/team_test.go

@@ -48,7 +48,7 @@ func TestCreateTeam(t *testing.T) {
 
 		rteam.Id = ""
 		_, resp, err = client.CreateTeam(context.Background(), rteam)
-		CheckErrorID(t, err, "app.team.save.existing.app_error")
+		CheckErrorID(t, err, "store.sql_team.save_team.existing.app_error")
 		CheckBadRequestStatus(t, resp)
 
 		rteam.Name = ""

server/channels/app/team.go

@@ -120,6 +120,8 @@ func (a *App) CreateTeam(c request.CTX, team *model.Team) (*model.Team, *model.A
 				return nil, model.NewAppError("CreateTeam", "store.sql_channel.save.direct_channel.app_error", nil, "", http.StatusBadRequest).Wrap(err)
 			case invErr.Entity == "Channel" && invErr.Field == "Id":
 				return nil, model.NewAppError("CreateTeam", "store.sql_channel.save_channel.existing.app_error", nil, "id="+invErr.Value.(string), http.StatusBadRequest).Wrap(err)
+			case invErr.Entity == "Team" && invErr.Field == "id":
+				return nil, model.NewAppError("CreateTeam", "store.sql_team.save_team.existing.app_error", nil, "id="+invErr.Value.(string), http.StatusBadRequest).Wrap(err)
 			default:
 				return nil, model.NewAppError("CreateTeam", "app.team.save.existing.app_error", nil, "", http.StatusBadRequest).Wrap(err)
 			}

server/i18n/en.json

@@ -9874,6 +9874,10 @@
     "id": "store.sql_team.save_member.exists.app_error",
     "translation": "A team member with that ID already exists."
   },
+  {
+    "id": "store.sql_team.save_team.existing.app_error",
+    "translation": "A team with this URL already exists."
+  },
   {
     "id": "store.sql_user.get_for_login.app_error",
     "translation": "Unable to find an existing account matching your credentials. This team may require an invite from the team owner to join."