3773652 - Request Maintenance app.: error while while deleting a draft attachment 'delete operation was not successful'

In Request Maintenance app. while deleting a draft attachment the following error is raised: "Delete operation was not successful"

• SAP Document Management System (CA-DMS)
• SAP S/4HANA on-premise
• SAP S/4HANA Cloud Private Edition 

Request Maintenance, Attachment service, Draft attachment, Delete operation was not successful, CL_CV_ATTACHMENT_DPC_EXT, method ORIGINALCONTENTS_DELETE_ENTITY, IF_DMS_FS_API~UNLINK_ATTACHMENT, The attachment is not file share relevant, Attachment deletion error,  , KBA , PLM-FIO-DMS , Fiori UI for Document management , CA-DMS , Document management , Problem