Hello Marcus

it's the ICM data?

You will not have doubts, there it says my data.

Release your's data first at:
* Data > Data Import > My data
* Data > Data Statistics

Run the export script and upload the new data to EAS;

Can someone tell me the exact procedure?

With maximum "off days" you can investigate if there is any data missing in the quotations. It's simple data calculation, between prices that you had imported. To tell you the maximum difference from Data1(last) - Data2(previous)

E.g. I've discovered a "hole" in my current brokers data on intraday prices the market ran out of quotations for 2 weeks. It was during a Christmas/new years eve, this does not mean all the data is rotten, but some time does.

Suggestion is also use History Quality from metatrader tester
Marcus I also use and check my data history quality and I advise you too do the test.
Do a simple backtest (using any ea) and check it using the metatrader tester. Look at the backtest metric "History Quality".

Metatrader5 Tester > History Quality 7% for X - Broker A

Metatrader5 Tester > History Quality 94% for X - Broker B

This metric is useful also can reveal if there is something wrong with the exported data.

Best regards;