Technical issue in switch version

hello,

I haven't fired up the Switch version of Apex in quite some time.

Then it came up, upgrade to a teen account. I agreed to the terms and conditions and typed in my email address.

Then it came up that this email address is a duplicate.

I also did the ps5 version of apex, so I thought maybe that's why this happened. 

I  deleted the save data from the ps5 version and typed my email address into the Switch version of apex again, but it came up again saying that this email address is a duplicate.

What can be done about this problem?

 I am using a translator so the sentence may be strange. I am very sorry for the long sentence. Thank you in advance for your response.