https://github.com/vyos/vyos-1x/blob/f3ff81f4f31cd3ecb5d648caff674663943db42f/op-mode-definitions/containers.xml.in#L63 and https://github.com/vyos/vyos-1x/blob/f3ff81f4f31cd3ecb5d648caff674663943db42f/op-mode-definitions/containers.xml.in#L121 say delete instead of show and update respectively
PR https://github.com/vyos/vyos-1x/pull/1305