fixing bug creating teams for trial users

rowers/models.py

@@ -363,10 +363,12 @@ class Team(models.Model):
                     "Basic user cannot be team manager"
                 )
 
-        if not can_add_team(manager):
-            raise ValidationError(
-                "Pro and Self-Coach users cannot have more than one team"
-                )
+        if not self.id:
+            # new model instance
+            if not can_add_team(manager):
+                raise ValidationError(
+                    "Pro and Self-Coach users cannot have more than one team"
+                    )
 
         super(Team, self).save(*args,**kwargs)