Version (value) shall not be used
ISO IEC 23003-4 (DRC):downmixInstructionsCount: "Supported in-stream payload processing for each profile [...] downmixInstructions [...]" (no x)
drcCoefficientsUniDrcCount: "Supported in-stream payload processing for each profile [...] drcCoefficientsUniDrc [...]" (no x)
drcInstructionsUniDrcCount: "Supported in-stream payload processing for each profile [...] drcInstructionsUniDrc [...]" (no x)
ISO IEC 23003-4:
Configure or update the encoder in order to use a version not (value), then reencode the content.