Creating an ad creative with multiple asset placements, titles and primary texts with the Meta Marketing API

I want to create an ad creative with the Meta/Facebook Marketing API. The goal is to create an ad creative which I can turn into an ad which has multiple images and primary texts and titles.

As shown in the picture, I want to have the same image in "Feeds, In-Stream Ads for Videos and Reels, Search Results" and "Right Hand, Search Results". I want a different image in "Stories and Reels, Apps and Websites".

Additionally, I want to specify multiple primary texts and multiple titles.

I tried to create the creative using this:

{     "object_story_spec": {       "page_id": "PAGE_ID"     },     "asset_feed_spec": {       "images": [         {           "hash": "HASH1",           "adlabels": [{"name": "label_feed"}]         },         {           "hash": "HASH2",           "adlabels": [{"name": "label_story"}]         }       ],       "bodies": [         {           "text": "Begin Your Adventure"         }       ],       "titles": [         {           "text": "Level Up"         },         {           "text": "Level Up 2"         }       ],       "call_to_action_types": [         "SHOP_NOW"       ],       "link_urls": [         {           "website_url": "https://www.example.com/"         }       ],       "ad_formats": [         "SINGLE_IMAGE"       ],       "asset_customization_rules": [         {           "customization_spec": {             "publisher_platforms": [               "facebook"             ],             "facebook_positions": [               "feed"             ]           },           "image_label": {             "name": "label_feed"           }         },         {           "customization_spec": {             "publisher_platforms": [               "instagram"             ],             "instagram_positions": [               "story"             ]           },           "image_label": {             "name": "label_story"           }         }       ]       },   "status": "PAUSED",   "degrees_of_freedom_spec": {         "creative_features_spec": {             "standard_enhancements": {                 "enroll_status": "OPT_OUT"             }         }     } } 

However, it gives me an error:

Multiple title elements cannot be applied to rule #1 (Priority, if specified, or index of the rule) in the Ad Asset Feed.

Additionally, it seems like I have to specify adlabels in the asset story spec. How can I place the images in the categories without the adlabels?