Repeater Area, Mask and Save DB

Hi,
​
I decided to use Repeater Area and the Mask that was previously working, but stopped working what may have happened?
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I saw that with the repeater it changes the name of the field.

As the field name changes, how do I write to the database?

You should call the repeater fields FOR EXAMPLE
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education[{var:area_repeater#.key}][dateCompleted]
and
education[{var:area_repeater#.key}][nameOfCourse]

Then in your database you have two tables. One for the main data, and one for data that gets put into a repeater area.
Then in your database you would use a loop event to loop through {data:education} and save each row to its own data row, related to the first table using {var:save_data_action_for_first_table.id} as the foreign key.
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Or you can use one data table, and use {data.jsonen:education} to save all of the repeater fields under one column as a json encoded array.

I do not understand how I can use this.

in the save event, how will it be because before I used it

{data: field_name}