So, I spoke with Apple about the high level of support on this issue. Obviously, in older versions of iTunes Connect, you can make the application package identifier the same if they have never received approval. There were several applications in the account, one of which had the same package identifier as the application in question. After changing the application package identifier, everything worked.
Interestingly, iTunes Connect no longer allows you to select the same package identifier (explicit) as another application, even if it is not approved. Another interesting point is that applications have the same package identifier since 2010. You do not know why this problem appeared now.
In addition, we were unable to submit this issue. Once this was fixed, we were able to file. Apple officials said they had never seen anything like it. Probably because so few applications that were relevant in 2010 when the old iTunes Connect interface was around to resolve this type of error are still relevant.
After a good week, headers on my keyboard are fixed and in good working order.
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