dafuweng-saiadmin6.x/server/db/dice_reward_unique_direction_grid.sql

-- 保证每个点数(direction, grid_number)唯一一条记录，避免多点数算出相同 end_index 时互相覆盖
ALTER TABLE `dice_reward` DROP INDEX `uk_tier_direction_end`;
ALTER TABLE `dice_reward` ADD UNIQUE KEY `uk_direction_grid_number` (`direction`, `grid_number`);