WP_Insert_Post creating duplicate posts when logged in

I'm creating posts to a custom post type with data in a json URL. I am using the wp_ajax_nopriv action and noticed that while logged in and running the action I get duplicate posts. If I use another browser and stay logged out I get the correct number of posts. I can't figure out what in my code is causing the posts to duplicate.

My function.php page:

add_action('wp_ajax_nopriv_get_breweries_from_api', 'get_breweries_from_api');
add_action('wp_ajax_get_breweries_from_api', 'get_breweries_from_api');

function get_breweries_from_api() {
    
    $ogURL = 'https://api.bridgedataoutput.com/api/v2/OData/actris/Property/replication?access_token=HIDDEN$select=Latitude,Longitude,StreetNumber,StreetName,City,StandardStatus,StateOrProvince,PostalCode,Media,ListPrice,ListingId$unselect=ListingKey,Media.MimeType,Media.ResourceRecordKey,Media.ResourceName,Media.ClassName,Media.MediaCategory,Media.MediaObjectID,Media.MediaKey,Media.Order,Media.ShortDescription$filter=contains(ListingId,%27888%27)';
    
    $current_page = ( ! empty($_POST['nextLink']) ) ? $_POST['nextLink'] : $ogURL;
    
    
    $activeurl = wp_remote_retrieve_body(wp_remote_get($current_page)); 
        $tet = json_decode($activeurl,true);
        $searchresults = $tet['@odata.nextLink'];
    $activeurl = json_decode($activeurl);
    $activeurl = $activeurl-value;
    
    //quit when empty or not array
    if( ! is_array( $activeurl ) || empty ( $activeurl ) ){
    return false; 
    }//end if statement
    
    foreach( $activeurl as $brewery) {
    $brewery_slug = sanitize_title($brewery-StreetName . '-' . $brewery-ListingKey);  
    
    
    $inserted_brewery = wp_insert_post([
        'post_name' = $brewery_slug,
        'post_title' = $brewery_slug, 
        'post_type' = 'brewery', 
        'post_status' = 'publish'
        ]); //end inserted brewery 
            
        $fillable = [
        'field_619b2f717de72' = 'ListingId',
        'field_619b2f987de73' = 'StreetName',
        'field_619d285a4cf88' = 'BridgeModificationTimestamp',
        'field_619d28814cf89' = 'ListingKey',
        ];
        
        foreach($fillable as $key = $name ) {
            update_field( $key, $brewery-$name, $inserted_brewery );
            } //end foreach
        
} //end foreach     
    
    wp_remote_post( admin_url('admin-ajax.php?action=get_breweries_from_api'), [
    'blocking' = false,
    'sslverify' = false,
        'body' = [
        'nextLink' = $searchresults  //this is what changes the current page above from 1 to 2 (needs to equal the next link)
        ]
    ] );
    
}// end get_brew_from_api function