Event tracking with GUID in value field

Does the value have to be numeric, I am trying to store unique Ids (strings) in the value field, but when i look at the reports only a zero (0) value is being stored.

here is example of issue:

“type”: “event”,
“eventCategory”: “Online-Ordering-Menu”,
“eventAction”: “ItemAddToCart”,
“eventName”: “ItemId”,
“eventValue”: 0 – I want this be value of the Item which is type GUID structure ‘4eb3f8ba-6bf2-414b-8146-b75bce6a283f’

is it possible to store that value?

See here: