Request - Error response to indicate field must be empty when not meeting conditions

[edsu7]

Summary of request

When given the following conditions :

"restrictions": [
    {
        "if": {
            "conditions": [
                {
                    "case": "any",
                    "fields": [
                        "insdc_project_accession"
                    ],
                    "match": {
                        "regex": "^(?!.*[\\x09\\x0A\\x0D])(?:\\S+(?: \\S+)*)?$"
                    }
                },
                {
                    "fields": [
                        "insdc_project_accession"
                    ],
                    "match": {
                        "codeList": [
                            "Not Applicable [GENEPIO:0001619]",
                            "Missing [GENEPIO:0001618]",
                            "Not Collected [GENEPIO:0001620]",
                            "Not Provided [GENEPIO:0001668]",
                            "Restricted Access [GENEPIO:0001810]"
                        ]
                    }
                }
            ],
            "case": "any"
        },
        "then": {
            "required": true
        },
        "else": {
            "empty": true
        }

Field must match conditionA or B else left empty.

If the value does not match A or B, the following error is returned:

INVALID_BY_RESTRICTION - Field: 'sampling_event_id' - Value: 'Sample S2C_Apr7' - Details: 'This field must be empty but was provided a value'

While technically correct, the error can confuse user. Lack of info to explain why the value should be empty.

Details

N/A

Desired solution

Something more informative e.g.

INVALID_BY_RESTRICTION - Field: 'sampling_event_id' - Value: 'Sample S2C_Apr7' - Details: 'This field must be empty as it did not satisfy criteria:
1) INVALID_BY_REGEX - did not meet regex "^(?!.*[\\x09\\x0A\\x0D])(?:\\S+(?: \\S+)*)?$"
2) INVALID_BY_CODELIST' - did not meet codeList [....]

Additional context

N/A