I am a beginner in Magento 2.
I installed a third party theme, in the home page, I founded this code on Layout Update XML field
<block class="Magento\Cms\Block\Block" name="home-slide15">
<argument name="block_id" xsi:type="string">home-slide15</argument>
I don't want this block to be displayed in the home page, so I tried to change the Block identifier "home-slide15" to my new block. and then I saved the home page. But I noticed that the code above remains as it is without any changes and the block identifier never changed. why!
Actually I am not familiar with Magento 2, I wanted to add some new block to the home page.