Candy Crush Saga or Candy Crush Soda can't install in mobile both same time.

@sarma_palash123 I have 4 king games installed on my phone so can only assume that you friends phone doesn't have the available memory space to install both games. she may need an extra memory card installed in here phone. What phone is she using.

System updates can bring improvements that could fix your issue.To check for and install system updates:

Open your device's Settings app Settings app.

Near the bottom, tap System and then Advanced and then System update. If needed, first tap About phone or About tablet.

Clearing cached data can free up needed space by removing temporary files. This is a short-term solution. Over time, cached data will build up again.

To clear the cache for the app:

Open your device's Settings app Settings app.

Tap Apps & notifications.

Tap the app. If you don't see it, first tap See all apps or App info.

Tap Storage and then Clear cache.( You can clear the cache of each app).

This may be the solution to your problem.

Welcome to the community.

I hope u can install it as i am also having two games on my oppo mobile. Its the device issue not games one.

Keep crushing and stay safe.