Unity报错如上图所示：
Asset database transaction committed twice!
Assertion failed on expression: 'errors == MDB_SUCCESS || errors == MDB_NOTFOUND'
Assertion failed on expression: 'm_ErrorCode == MDB_MAP_RESIZED || !HasAbortingErrors()'
关掉文件
重新**许可证即可
再次打开文件 运行无措
（所以许可证要每天**？？？）