I am trying to set up a daily report with discord.py. You can find my (minimised) code below. The idea is to retain the reports through bot restarts by using a database to reinitialise them during on_ready. The problem is that sometimes two identical cogs seem to get added and the DO SOMETHING part runs twice (or more). This gets fixed by manually removing the cog (via name) from both active_cogs and the database and readding it. But I cannot understand why and how it gets duplicated – I thought two cogs cannot have the same cog_name, hence why I am identifying the cog with the id and time of the report.

import discord
from discord.ext import commands, tasks

active_cogs: list[commands.Cog] = []

class Reporter(commands.Cog):
    def __init__(self, cur_bot: commands.Bot, author_id, time_string):
        self.__cog_name__ = f"{author_id}:{time_string}"
        self.bot = cur_bot
        self.time_of_report = time(hour=self.time, minute=0, second=0)
        self.reportee = None
        asyncio.create_task(self.init_reportee(author_id))

        self.reporter.start()

    async def init_reportee(self, author_id):
        self.reportee = await self.bot.fetch_user(author_id)
        self.reporter.change_interval(time=self.time_of_report)

    @tasks.loop()
    async def reporter(self):
        # DO SOMETHING

@bot.event
async def on_ready():
    active_reports = get_all_reports() # this gets requested reports from db
    for report in active_reports:
        report_cog = Reporter(cur_bot=bot, author_id=report[0], time_string=report[1])
        active_cogs.append(report_cog)
        await bot.add_cog(report_cog)

@bot.hybrid_command(name='addreport')
async def addreport(ctx, hour: int):
    add_report_to_db(ctx.author.id, date_and_time, mode)
    new_reporter = Reporter(cur_bot=bot, author_id=ctx.author.id, time_string=hour)
    active_cogs.append(new_reporter)
    await bot.add_cog(new_reporter)