Overview:

Prevent user from changing data fields to control fields and vice versa.

Requirements:

When user is execution a PUT request on fields endpoint with changing the field tag:

1. From 00X control field to data field: An error message(s) should return informing the user that they must specify indicator and subfield values

2. From data field to 00X control field: Then following messages should display: Cannot define indicators for 00X control fields. Cannot define subfields for 00X control fields.

Example:

When user is execution a PUT request on fields endpoint with changing the field tag:

1. From 009 to 102: An error message(s) should return informing the user that they must specify indicator and subfield values

2. From 102 to 009: Then following messages should display: Cannot define indicators for 00X control fields. Cannot define subfields for 00X control fields.