private async Task DuplicateSquadsAndSlots(RoundSide source, RoundSide target, bool includeUser)
{
_context.RemoveRange(target.Squads);
target.Squads = source.Squads.Select(s => DuplicateSquadAndSlots(target, s, includeUser)).ToList();
_context.AddRange(target.Squads);
await _context.SaveChangesAsync();
}