setCustomField Not updating values in CT using cart API

Cart API trying to perform action:setCustomField with boolean value true e.g,

{
"version": {{cart-version}},
"actions": [
{
"action" : "setCustomField",
"name" : ,
"value" : true
}
]
}
There were 2 action items provides one was set successfully the other one didnt.

### Expected Behavior

Expected was it should set the value to true.

### Current Behavior

For one of the order its not setting the value.
And response got is 200