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faq:troubleshooting:after_upgrading_server [2019/11/24 22:30] (current)
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 +====== After upgrading, server fails with "citadel: Cannot install certificate: key values mismatch" ======
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 +This occasionally happens when upgrading from a much older Citadel system that generated a key and self-signed certificate using older code. The key and certificate are kept in the **keys/** subdirectory. If you have a self-signed certificate that you don't care about, you can simply delete all three files in that directory, and the newer Citadel code will generate a new private key and self-signed certificate. 
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 +Alternately, you can follow [[faq:troubleshooting:howto_install_new_certificate|these instructions]] for generating a new key and cert using the OpenSSL command line tool.
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