existing Id is key OCID and it is not the format that readKmsKey expects managementEndpoint/{managementEndpoint}/keys/{keyId} GetCompositeKeyId is only used for resource discovery and it returns the Id as expected by readKmsKey method terraform import oci_kms_key.test_key "managementEndpoint/{managementEndpoint}/keys/{keyId}".

existing ID() returned by getKeyVersionCompositeId method is of format keys/(.*)/keyVersions/(.*) and that is not the format that readKmsKeyVersion expects managementEndpoint/{managementEndpoint}/keys/{keyId}/keyVersions/{keyVersionId} GetCompositeKeyVersionId is only used for resource discovery and it returns the Id as expected by readKmsKeyVersion terraform import oci_kms_key_version.test_key_version "managementEndpoint/{managementEndpoint}/keys/{keyId}/keyVersions/{keyVersionId}".