On this page, you will find more information about the most common causes and most relevant solutions for the Netsuite error 'CSTM_FIELD_KEY_REQD'. Do you need help straight away? Visit our support page.
The Oracle Corporation documentation indicates that error code 'CSTM_FIELD_KEY_REQD' is caused by the following problem: "The specified custom field key is missing.".
Do you think there is another cause for this error? Let others know in the comments.