Can't add record with empty numerical value

Hi all,

I’m trying to add the record below, but running into an issue if any of the numerical values are empty, e.g ‘List Price - Max’.

As soon as I fill in the value, the upload works fine. Is there something I’m missing with the formatting / syntax?

JSON Object:
products {
“Product Name”: “Hula Outdoor Barstool”,
“Description”: “Nobody does fun in the sun quite like the Hula outdoor barstool. Perforated steel seats and back keep things cool while a round hoop steel frames keeps things comfortable. The entire Hula collection is suitable for indoor or outdoor use.\n\nAvailable in chair, counter stool, and barstool.\n\n5/8" round, 12-gauge steel tube frame\nPowder coated perforated steel seat and back\nPlastic glides”,
“Manufacturer”: “Grand Rapids Chair Co”,
“Product Subcategory”: [“Bar & Counter Stools”, “Dining”],
“Tag”: [“Outdoor”, “Steel”, “Perforated”],
“Designer”: “Paul James”,
“Lead Time”: 4,
“Certifications”: “”,
“List Price - Min”: 618,
“List Price - Max”: ,
“Product Category”: [“Seating”, “Outdoor”],
“SKU”: “845BS-66”,
“Weight”: ,
“objectID”: “1675570395278x941836419180476300”