This issue might be caused due to a low value at the max_input_vars parameter.
To fix this problem, go to PHP settings (either php.ini directly or some GUI) and change the max_input_vars parameter(3000-3500 is probably a good range to start with). Learn how to do it.
*What is PHP max input vars?
The PHP Max Input Vars is the maximum number of variables your server can use for a single function.
Please note that if you have a need to create many versions, we highly recommend exploring our CSV Extension as an alternative to dynamic triggers. This approach offers several advantages, including faster content loading and easier management in both the short and long term.