Here is the error message :
Failed to import.
You have uploaded an APK that is not signed with the same certificate as your previous APKs. You must use the same certificate; Your existing APKs are signed with the certificate (s) bearing the following digital empties: SHA1: 0F 4D 78 AC 3B A1 10 7B 31 90 9B 81 5C 81 07 8C 45 92 45 6D
the certificate (s) used to sign the downloaded APK contains the following fingerprints: SHA1: DD 2B 8F AB 67 57 7C E5 57 12 D9 88 1D EB A7 E7 6D 7B 8D F5
cordially