ruby on rails - Create variants of products with null option_value label using BigCommerce v3 API -

i using bigcommerce v3 api create products on bigcommerce store. have product 2 variants having following options

size                 self life      dot info 1l glass amber        500ml glass amber    12           methanol sol. 

when trying create product

{   "name": "product name",   "type": "physical",   "sku": "cdid-12345",   "description": "description",   "weight": 0,   "width": 0,   "depth": 0,   "height": 0,   "price": 0,   "cost_price": 0,   "retail_price": 0,   "sale_price": 0,   "categories": [1],   "variants": [     {       "cost_price": 0,       "price": 0,       "weight": 0,       "sku": "mp091236",       "option_values": [         {           "option_display_name": "size",           "label": "1l glass amber",         }       ]     },     {       "cost_price": 0,       "price": 0,       "weight": 0,       "sku": "mp091239",       "option_values": [         {           "option_display_name": "size",           "label": "500ml glass amber",         },         {           "option_display_name": "self life",           "label": "12",         },         {           "option_display_name": "dot info",           "label": "methanol sol.",         }       ]     }   ] } 

then getting error:

variants must have the same list option display names. 

and when passing parameters this:

{   "name": "product name",   "type": "physical",   "sku": "cdid-12345",   "description": "description",   "weight": 0,   "width": 0,   "depth": 0,   "height": 0,   "price": 0,   "cost_price": 0,   "retail_price": 0,   "sale_price": 0,   "categories": [1],   "variants": [     {       "cost_price": 0,       "price": 0,       "weight": 0,       "sku": "mp091236",       "option_values": [         {           "option_display_name": "size",           "label": "1l glass amber",         },         {           "option_display_name": "self life",           "label": "",         },         {           "option_display_name": "dot info",           "label": "",         }       ]     },     {       "cost_price": 0,       "price": 0,       "weight": 0,       "sku": "mp091239",       "option_values": [         {           "option_display_name": "size",           "label": "500ml glass amber",         },         {           "option_display_name": "self life",           "label": "12",         },         {           "option_display_name": "dot info",           "label": "methanol sol.",         }       ]     }   ] } 

then getting error this:

"variants.0.option_values.1.label": "label must string" 

how can create 2 skus of product 1 have options size , self life , dot info , other having size option.

in case seems want self life , dot info non required modifiers instead rather options

basically create 2 variants each having option values shown below on above endpoint

"variants": [ {    ...     "option_values": [     {       "option_display_name": "size",       "label": "1l glass amber",     }   ] } {     ...     "option_values": [     {       "option_display_name": "size",       "label": "500ml glass amber",     }   ] } 

and create 2 modifiers (one display_name: self life other display_name: dot info) posting twice on v3/catalog/products//modifiers