The message concerns the database table options, which is used by WordPress. Individual entries in the table have a very high value in themselves and are automatically loaded each time the page is called up. The background is described here in a very technical form: https://make.www.ads-software.com/core/2024/06/18/options-api-disabling-autoload-for-large-options/
You have 3 options:
a) You check which component of your project leaves such large data records in the options table. This could be difficult to find. A look at the data records in SQL would be most suitable, if you are able to do so.
b) You can use a PHP hook to increase the threshold value for the warning. This would stop it from being displayed. Details are described in the link above.
c) You ignore the warning. It is primarily intended to alert you to a possible error.
