Dash as the object key fails to increment/decrement

[fr3shn3ss]

You can create an object like this but you can't increment it using add(). it throws "ValidationException: Invalid UpdateExpression: Syntax error; token: "-", near: "MarketplaceFacilitatorTax-Principal""

{
"srTas.MarketplaceFacilitatorTax-Principal": -7.4
}

[kayomarz]

I see. it would be great if you can you post a small example which leads to the error.
i.e. code which creates an object and then on which you try using add to increment it. this will help me get started to look into this. thanks.