Error when a new version in Google Play

I want to add a new version of an android app that has been active since June this year. I am getting an error message and for the life of me can’t figure out how to fix it.
I have the original app set to have google set the key. How do i fix this?

Your Android App Bundle is signed with the wrong key. Ensure that your App Bundle is signed with the correct signing key and try again. Your App Bundle is expected to be signed with the certificate with fingerprint:

SHA1: 23:E9:5D:E9:0D:0E:18:6A:B5:13:9D:5C:BC:7B:BA:8E:5C:A1:F6:23

but the certificate used to sign the App Bundle you uploaded has fingerprint:

SHA1: 9E:55:C2:C8:A8:7A:DC:2D:D1:70:6C:B5:77:07:86:BA:33:F7:47:53

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