repetear does not save to sql

hi;
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I have a multipage form which form's last page has a repeater area with multiply option. I attached screenshots of events and last page fields. My form does not save datas to form's database. I can not find my mistake.
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Happy new year!
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thanks for your help.
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Debugger result is:
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Auto manage doesn't work with array style field names. Build your database table manually and manually add the fields to the data override list

thanks for your answer. But repater is creating fields on database. I checked in phpmyadmin. Form does not saving repeater are or unrepeater area. Problem is not only on repater fields. And if a user wants creating much more fields by multiply button, how can I know how much field I will create.
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If I can not do this by multiply can I do that according to dropdown data provider?
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thanks and happy new year

thanks for your answer. But repater is creating fields on database. I checked in phpmyadmin. Form does not saving repeater area or unrepeater area. Problem is not only on repater fields.
And if a user wants creating much more fields by multiply button, how can I know how much field I will create. If I can not do this by multiply can I do that according to dropdown data provider?
thanks and happy new year

Need to either save each as an entry on another table and reference the parent table, or JSON encode them and save them as a TEXT or JSON field in the database.

I removed repeater area and fields. But form does not save datas to joomla database. I attached phpmyadmin screenshot and debugger result screenshots. thank you.
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thank you Bob.