没有这个限制！

第一个错误清楚地表明它不能创建该约束，因为所涉及的这两列的数据类型(Game.Id 和 Tester.Game代码>) 不匹配.

The first error clearly says that it could NOT create that constraint since the datatypes of those two columns involved (Game.Id and Tester.Game) do not match.

您应该做的是检查您是如何创建导致第一个错误的 FK 约束 - 并明确为该 FK 约束指定一个有意义的名称！

What you should do is check how you're creating your FK constraint that leads to that first error - and explicitly give that FK constraint a meaningful name!