Apple id

Do you have apps on the device that you downloaded with the old ID? If you do, you need to delete them and buy them again with the new ID. It is probably trying to update them automatically and finding it cannot log into the account used to buy them.

Hello Nour,

Sorry to tell you this but BIG mistake. :-(

How to delete your Apple ID account - Apple Support

"Make sure that you sign out of all your devices to avoid issues with apps that use your Apple ID account or iCloud. After your account is deleted, you can't sign out of iCloud or turn off Find My iPhone Activation Lock on your devices. If you forget to sign out, you might not be able to use your device when your account is deleted."

You can see if you can get this service to work which will reset a device: https://al-support.apple.com/#/additional-support

Did you try my second suggestion to check that web service? Click on the last link.

Something does not make sense here. If you have set up Find My using the new ID then it should no longer have the old ID set on the phone.

It depends upon why you are getting those notices, but yes, for either of the reasons I suspect it will ask for the old Apple ID.