I wanted to use my Apple ID for my new iPhone but it says it can’t be used for it this device.I made another Apple ID for the old one but the new one stuck on the same one.What should I do?

You need to sign out of the old ID after turning off Find My Phone. If there is data on the phone, you might want to do the steps in the article below.

Selling/Giving Away Device. 

If necessary, see if you can recover the ID/password. Use every email address you can think of.

Apple ID - How to find your Apple  -  An iCloud e-mail address is an Apple ID.

Apple ID - Find  -       

If you forgot the Apple ID (iCloud) password, enter the Apple (iCloud) ID, and click Forgot Password. See if you can get a Rescue or Notification email option if necessary. Link to contact Apple Support at the end of the 2nd article.

Apple ID - Manage  -     

Apple ID – Forgot Password  *