Home contact form 7 limited submissions specified by field
 I have installed Wordpress plugins: Contact Form 7, Contact Form 7 Conditional Fields and Contact Form 7 DB (customised by me). Interested users are registering on event via form and there Users have several lectures to choose from. I want to set limit for every lecture which is determined in form by "select*" type. In situation when user will want to register for lecture where is already maximum people, He should get information about this (for example: "There is no place for You here, choose some other lecture".) My Question is - how can I do this...? Where should I create this logic condition? Maybe CF7 Conditional Fields allowing to make it? CF7 database I edited to look similar like below: | form_id | name | surname | address | lecture | date | 1 | Tom | Bum |some_addr|WP programming| 17-04-2018  I will be very grateful for help. Greetings.