Fix crash when saving rows

packages/client/src/api/index.js

@@ -80,6 +80,7 @@ const makeRowRequestBody = (parameters, state) => {
   if (body._table) delete body._table
 
   // then override with supplied parameters
+  if (parameters.fields) {
     for (let fieldName of Object.keys(parameters.fields)) {
       const field = parameters.fields[fieldName]
 
@@ -101,6 +102,8 @@ const makeRowRequestBody = (parameters, state) => {
         body[fieldName] = field.value
       }
     }
+  }
+
   return body
 }