3679809 - 'Multiple active accounts exists' Error Message Submitting UK MTD VAT Return

The Submission of an UK MTD VAT Return to the HMRC tax authority finishes with error:

"|Multiple active accounts exists for VRN GBXXX.|Technical Response: Missing required parameter: Client / Account Registration Located in: REMOTE_CONNECTOR-PROCESS_DATA."

(GBXXX represents the UK Company's VAT registration number).

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