Support for duplicate labels (but different values) was deprecated in commit e4c9079d091a2eeac8a74a0356e3f348db873b87 (Docker 1.13), and scheduled for removal in 17.12 Signed-off-by: Sebastiaan van Stijn <github@gone.nl> Upstream-commit: 8c6322338c91cdb88b1fef4def393d9a7b670366 Component: engine