Why was it broken

apps/participation/forms.py

@@ -10,6 +10,7 @@ from django.utils import formats
 from django.utils.translation import gettext_lazy as _
 from PyPDF3 import PdfFileReader
 
+from registration.models import VolunteerRegistration
 from .models import Note, Participation, Passage, Pool, Solution, Synthesis, Team, Tournament
 
 
@@ -136,6 +137,7 @@ class TournamentForm(forms.ModelForm):
         self.fields["syntheses_second_phase_limit"].widget = DateTimePickerInput(
                 format=formats.get_format_lazy(format_type="DATETIME_INPUT_FORMATS", use_l10n=True)[0])
         self.fields["organizers"].widget = forms.CheckboxSelectMultiple()
+        self.fields["organizers"].queryset = VolunteerRegistration.objects.all()
 
     class Meta:
         model = Tournament