E28039 — AMBSuppressionNotRemovable

Only manual Apple suppressions can be ended manually.

• HTTP status: 422
• Type: validation_error
• Name: AMBSuppressionNotRemovable

What to do

A newer message from the recipient can reopen the conversation. Phone invitations require fresh consent recorded through preferences with consented_at after the revocation; reopening a conversation does not restore invitation consent.

Related

• E28xxx — Apple Messages for Business: every code in this range
• Errors: the full wire contract, status mapping, and error catalog
• Error handling: branching on type and code, validation details, and vendor_code