The Supporting Document is in a non-deletable status and is not eligible to be deleted until the Supporting Document transitions to a deletable status.
The Supporting Document is in a non-deletable status (PENDING_REVIEW).
Wait for the Supporting Document to transition to a deletable status (DRAFT, TWILIO_REJECTED, TWILIO_APPROVED). If your Supporting Document is idle for more than 3 business days, please reach out to Twilio Support through the Console or Help Center.