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Hi, it looks like CF7 5.1.9 came out in 2020. I’ve not tried the latest version of Honeypot on that version of CF7, but it is possible something was changed between 2.0.5 and 2.1 of this plugin (which happened around that time). A lot of new features were added in 2.1. If you have no way to get off of the old CF7 version (and it is highly recommended you find a way, because plugins should always be kept up to date for better security), then you can try using Honeypot 2.0.5 (available here)