Errors when entering the coupon code

The following may be the cause of the error.
Please check the error message below.

[Error title: Unable to register friend invite code]
-------------------------------
Error message: You cannot enter your own friend invite code.
→ You cannot register friend invitation code issued by yourself due to the rule of the program.
-------------------------------

[Error title: Friend invite code cannot be registered more than once]
-------------------------------
Error message: A different friend invite code is already registered. Multiple registrations are not possible.
→ It seems that you have registered a friend invitation code in your current or previous account.
If you do not recognize this message, please contact us from [here (Inquiry form) ].
-------------------------------

[Error title: New members only code cannot be registered more than once]
-------------------------------
Error message: A different new members only code is already registered. Multiple registrations are not possible.
→ New member-only codes refer to the following

• Coupon codes on GO or MOV posting flyers or postcards
• Coupon codes on GO or MOV tissues received from drivers
• Other coupon codes

-------------------------------

[Error title: Please update to the latest version of the app]
-------------------------------
Error message: The coupon code you entered is not compatible with the current app version. Please update your GO app to the latest version.
→ The coupon code you entered may not be supported by the version of the GO app you are currently using. Please update your GO app to the latest version.
-------------------------------

[Error title: Unable to register due to not meeting conditions]
-------------------------------
Error message: Customers who have traveled with GO app before cannot register a friend referral code.
→ Friend Referral Code registration is only available to those who do not have a previous GO ride.
This message will appear if you have already taken a ride on GO with your current or previous account.
If you do not have a ride history, or if you do not recognize yourself, please contact us from [here (Inquiry form) ].
-------------------------------

* If your new phone number has already been used, please contact us from [here (Inquiry form) ].

If none of the above applies to you, please contact us using from [Inquiries] in the app or from and [here (Inquiry form) ].
Please attach a screenshot of the relevant error screen.

*Some coupons are only available for users who registered with a Japanese phone number.