Bot cant delete all messages in a channel, it always deletes only 50

[dusk depot]

Code:

                    MessageHistory messageHistory = MessageHistory.getHistoryFromBeginning(event.getChannel()).complete();
                    if (messageHistory.getRetrievedHistory().size() <= 50) {
                        event.getChannel().asTextChannel().deleteMessages(messageHistory.getRetrievedHistory()).complete();
                        event.deferReply().queue();
                        event.getHook().sendMessage("Successfully deleted all messages").queue();
                    } else {
                        bulktimes = (int) Math.ceil((double) messageHistory.size() / 50);
                        System.out.println(bulktimes);
                        deleteMessages(messageHistory.getRetrievedHistory(), event);
                    }

                    public void deleteMessages(List<Message> messages, SlashCommandInteractionEvent event) {
                      for (Message m : messages) {
                        m.delete().complete();
                      }
                    }

[frigid parcel]

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