How to remove duplicate mention in Google Calendar?

Question

Google Calendar

Last summer there was a ton of free time. I didn’t want to lose him and decided to make a strict daily routine. Scheduled for about a day. Through Android, I started adding reminders to the calendar. Then I remember the calendar still picked up background pictures (itself) for mentions. The calendar also offered to select the period of the day (morning / afternoon / evening) and then automatically selected the right time for the event, taking into account the fact that there are others nearby. Mentions appeared every day and at the right time. Cool!
But now I can't get rid of them. In the calendar, those very mentions are lined up xs how much time ahead. For example, I click on one of the repeated reminders and delete it. But that reference is removed. The same reminder remained for tomorrow and the day after tomorrow and a year ahead. Found the day I created them. I clicked on the very first one, deleted it and again the same garbage. there is no "stop repeating" or delete all feature. What to do?