old_contents: from django.contrib import admin
  
  import reversion
  
  from models import (ActType, CFTMEACode, FamilySituationType, HealthCenter,
          InscriptionMotive, Job, Nationality, Office, ParentalAuthorityType,
          ParentalCustodyType, Room, School, SchoolTeacherRole,
          Service, SessionType, TransportCompany, TransportType,
          UninvoicableCode, WorkerType, LargeRegime)
  
  admin.site.register(ActType, reversion.VersionAdmin)
  admin.site.register(CFTMEACode, reversion.VersionAdmin)
  admin.site.register(FamilySituationType, reversion.VersionAdmin)
  admin.site.register(HealthCenter, reversion.VersionAdmin)
  admin.site.register(LargeRegime, reversion.VersionAdmin)
  admin.site.register(InscriptionMotive, reversion.VersionAdmin)
  admin.site.register(Job, reversion.VersionAdmin)
  admin.site.register(Nationality, reversion.VersionAdmin)
  admin.site.register(Office, reversion.VersionAdmin)
  admin.site.register(ParentalAuthorityType, reversion.VersionAdmin)
  admin.site.register(ParentalCustodyType, reversion.VersionAdmin)
  admin.site.register(Room, reversion.VersionAdmin)
  admin.site.register(School, reversion.VersionAdmin)
  admin.site.register(SchoolTeacherRole, reversion.VersionAdmin)
  admin.site.register(Service, reversion.VersionAdmin)
  admin.site.register(SessionType, reversion.VersionAdmin)
  admin.site.register(TransportCompany, reversion.VersionAdmin)
  admin.site.register(TransportType, reversion.VersionAdmin)
  admin.site.register(UninvoicableCode, reversion.VersionAdmin)
  admin.site.register(WorkerType, reversion.VersionAdmin)
  
new_contents: from django.contrib import admin
  
  import reversion
  
  from models import (ActType, CFTMEACode, FamilySituationType, HealthCenter,
          InscriptionMotive, Job, Nationality, Office, ParentalAuthorityType,
          ParentalCustodyType, Room, School, SchoolTeacherRole,
          Service, SessionType, TransportCompany, TransportType,
          UninvoicableCode, WorkerType, LargeRegime, SocialisationDuration)
  
  admin.site.register(ActType, reversion.VersionAdmin)
  admin.site.register(CFTMEACode, reversion.VersionAdmin)
  admin.site.register(FamilySituationType, reversion.VersionAdmin)
  admin.site.register(HealthCenter, reversion.VersionAdmin)
  admin.site.register(LargeRegime, reversion.VersionAdmin)
  admin.site.register(InscriptionMotive, reversion.VersionAdmin)
  admin.site.register(Job, reversion.VersionAdmin)
  admin.site.register(Nationality, reversion.VersionAdmin)
  admin.site.register(Office, reversion.VersionAdmin)
  admin.site.register(ParentalAuthorityType, reversion.VersionAdmin)
  admin.site.register(ParentalCustodyType, reversion.VersionAdmin)
  admin.site.register(Room, reversion.VersionAdmin)
  admin.site.register(School, reversion.VersionAdmin)
  admin.site.register(SchoolTeacherRole, reversion.VersionAdmin)
  admin.site.register(SocialisationDuration, reversion.VersionAdmin)
  admin.site.register(Service, reversion.VersionAdmin)
  admin.site.register(SessionType, reversion.VersionAdmin)
  admin.site.register(TransportCompany, reversion.VersionAdmin)
  admin.site.register(TransportType, reversion.VersionAdmin)
  admin.site.register(UninvoicableCode, reversion.VersionAdmin)
  admin.site.register(WorkerType, reversion.VersionAdmin)
  
subject: add socialisation duration model to admin.