How to change the content in the group field plugin Advanced Custom Fields?

On the WordPress site implemented display a phone number through a group of fields by means of the plugin Advanced Custom Fields. How to change the displayed number to the new number?
Type code from the class:
<span><?php the_field('phone-1',12); ?></span>
April 3rd 20 at 18:50
1 answer
April 3rd 20 at 18:52
Go to the page editor/post ID12 and edit the contents of the field + save the page/post.
@gennaro36, locate the page/post with id12 - Jocelyn.Block commented on April 3rd 20 at 18:55

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