"No such column 'New_Field__c' on entity 'Custom_Object__c'" when querying Object deployed via Change Set

Question

I've deployed an Inbound Change Set at one of my Sandbox instances. With this Change Set there was a new field created on one of the objects. However, the following query:

SELECT COUNT() FROM Custom_Object__c WHERE New_Field__c = NULL

Returns an error:

[object Object]: FROM Custom_Object__c WHERE New_Field__c != NULL ^ ERROR at Row:1:Column:46 No such column 'New_Field__c' on entity 'Custom_Object__c'. If you are attempting to use a custom field, be sure to append the '__c' after the custom field name. Please reference your WSDL or the describe call for the appropriate names.

The Custom_Field__c is present in Object Manager. I'm 100% sure both field's and object's names are typed correctly.

What may be wrong here?

Answer 1

You almost certainly omitted permissions to read this field for your profile. Edit the Field Level Security and make sure you have at least Read access.