yum 更新依赖项错误

我正在做一个yum update但我有这个错误：

Error: Package: php56w-opcache-5.6.18-1.w6.x86_64 (webtatic)
       Requires: php56w-common(x86-64) = 5.6.18-1.w6
       Removing: php56w-common-5.6.17-1.w6.x86_64 (@webtatic)
           php56w-common(x86-64) = 5.6.17-1.w6
       Obsoleted By: php-common-5.6.18-1.el6.remi.x86_64 (remi-php56)
           Not found
       Updated By: php56w-common-5.6.18-1.w6.x86_64 (webtatic)
           php56w-common(x86-64) = 5.6.18-1.w6
Error: Package: php56w-mysql-5.6.18-1.w6.x86_64 (webtatic)
       Requires: php56w-pdo(x86-64)
       Removing: php56w-pdo-5.6.17-1.w6.x86_64 (@webtatic)
           php56w-pdo(x86-64) = 5.6.17-1.w6
       Obsoleted By: php-pdo-5.6.18-1.el6.remi.x86_64 (remi-php56)
           Not found
       Updated By: php56w-pdo-5.6.18-1.w6.x86_64 (webtatic)
           php56w-pdo(x86-64) = 5.6.18-1.w6
 You could try using --skip-broken to work around the problem
 You could try running: rpm -Va --nofiles --nodigest

我应该怎么做才能解决这个问题？我尝试使用 --skip-broken，但它不会更新。谢谢。