Eight months after voters approved it, Missouri Gov. Mike Kehoe signed the repeal of a law Thursday that had guaranteed paid sick leave to workers and inflationary adjustments to the minimum wage.

The move marked a major victory for the state’s largest business group and a frustrating defeat for workers’ rights advocates, who had spent years — and millions of dollars — building support for the successful ballot measure. The repeal will take effect Aug. 28.

Kehoe, who also signed a package of tax breaks Thursday, described the paid sick leave law as an onerous mandate that imposed burdensome record-keeping.