Bulk Export 400 on Legal Hold Metadata Filter

Stuck on a bulk export job failure. environment: genesys cloud byoc eu-west-1. endpoint: post /api/v2/bulkexports/exportjobs. filter: legal_hold_status for compliance audit trails. the api returns 400 bad request with invalid filter syntax.

the documentation lists legal_hold_status as a valid attribute for recording exports. is this field excluded from bulk export filters in the eu-west-1 region?