it's a start

rowers/models.py

@@ -30,7 +30,7 @@ from django.utils import timezone
 import pandas as pd
 from dateutil import parser
 import datetime
-from django.core.exceptions import ValidationError
+
 from rowers.rows import validate_file_extension
 from collections import OrderedDict
 from timezonefinder import TimezoneFinder
@@ -313,6 +313,13 @@ class C2WorldClassAgePerformance(models.Model):
 
         return thestring
 
+def is_not_basic(user):
+    if user.rower.rowerplan == 'basic':
+        raise ValidationError(
+            "Basic user cannot be team manager"
+            )
+    
+
 # For future Team functionality
 class Team(models.Model):
     choices = (
@@ -327,7 +334,7 @@ class Team(models.Model):
     
     name = models.CharField(max_length=150,unique=True,verbose_name='Team Name')
     notes = models.CharField(blank=True,max_length=200,verbose_name='Team Purpose')
-    manager = models.ForeignKey(User, null=True)
+    manager = models.ForeignKey(User, null=True, validators=[is_not_basic])
     private = models.CharField(max_length=30,choices=choices,default='open',
                                verbose_name='Team Type')